We are only taught God’s Holy Word and message in accordance with our very, limited capacity and understanding and not in accordance with the true nature and understanding of God’s divine teachers and manifestations:
We cannot bear, or even comprehend, all the knowledge and information that God’s holy manifestations possess and can tell us: All that God’s divine teachers and manifestation’s tell us, is not really in accordance with all that they know or can say. There is much more they can tell us, but we just, unfortunately, cannot handle this whole truth for ourselves. 
Christianity: 1 Corinthians 2:13 “We speak, not in the words which man’s wisdom teacheth, but (that) which the Holy Ghost teacheth; comparing spiritual things with spiritual.” For, 2:7 “We speak the wisdom of God in a mystery, even the hidden wisdom, which God ordained before the world unto our glory:” If God’s messengers were to tell us all that they really know, it would be much, much more then we can handle, and we might just cease to function on this earthly plane we live on. 
Baha’i Faith: “Were We to reveal the hidden secrets — all they that dwell on earth and in the heavens would swoon away and die, except such as will be preserved by God, The Almighty, The All-Knowing, The All-Wise (for) such is the inebriating effect of the words of God.” (Bahá’í Faith, Baha’u’llah, Gleanings from the Writings of Baha’u’llah, p. 35)
God’s holy manifestations know of our inability to comprehend and bear the enormity of God’s holy message, so they only give us what we can bear and understand at the time; and Jesus Christ clearly tells us this in John: Christianity: But, John 3:12 “If I have told you earthly things, and ye believe (me) not, how shall ye believe, if I tell you of heavenly things?” For, 16:12 “I have yet many things to say unto you, but ye (you) cannot bear them now.” 16:13 “Howbeit when he, the Spirit of truth, is come, (unto you, for) he will guide you into all truth: for he shall not speak of himself; but what-so-ever he shall hear, that shall he speak: and he will shew you things to come.” For, 
Judaism: Deuteronomy 29:29 “The secret things belongeth unto The LORD our God: but those things which are revealed belong unto us and to our children.” Because the Baha’i Faith: “Divine things are too deep to be expressed by (mere) common words.” (Abdu’l-Baha, Abdu’l-Baha in London, p. 79)
BABI RELIGION: “This is the divinely-inscribed Book — the outspread Tablet — the utterance which lay concealed.” “These utterances are revealed according to your measure, not to God‘s, and unto this beareth witness that which is enshrined in the knowledge of God, did ye but know. Unto this testifieth He Who is the Mouthpiece of God, could ye but understand. By the righteousness of God! Were We to lift the veil, ye would swoon away.”
(The Bab, Selections from the Writings of the Bab, pp. 6 and 154)
CHRISTIANITY: 1 Corinthians 3:1 “And I, brethren, could not speak unto you as unto spiritual, but as unto carnal, even as unto babes in Christ.” For, 3:2 “I have fed you with milk and not with meat: for hitherto ye were not able to bear it, neither yet now are ye able.” For, 2 Corinthians 4:18 “We look not at the things which are seen, but at the things which are not seen: for the things which are seen are temporal; but the things which are not seen are eternal.” For, 4:3 “If our gospel be hid, it is hid (from) them that are lost:” 4:4 “In whom the God of this world hath blinded the minds of them which believe not, lest the light of the glorious gospel of Christ, who is the image of God, should shine unto them.” Because, 2:14 “The natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know them, because they are spiritually discerned.” 2 Corinthians 8:12 “For if there be first a willing mind, it is accepted according to that a man hath, and not according to that he hath not.” God can only give to man according to what he has within him or what he can understand and comprehend, and not according to what he hath not, or what he is not able to know or realize.
BAHA’I FAITH: “O SON OF BEAUTY!” “By My spirit and by My favor! By My mercy and by My beauty! All that I have revealed unto thee with the tongue of power, and have written for thee with the pen of might, hath been in accordance with thy capacity and understanding, not with My state and the melody of My voice.”
(Baha’u’llah, The Arabic Hidden Words)
Baha’i Faith: “Follow thou the way of thy Lord, and say not that which the ears cannot bear to hear, for such speech is like luscious food given to small children. However palatable, rare and rich the food may be, it cannot be assimilated by the digestive organs of a suckling child. Therefore unto everyone who hath a right, let his settled measure be given.” (Because) “not everything that a man knows can be disclosed, nor can everything that he can disclose be regarded as timely, nor can every timely utterance be considered as suited to the capacity of those who hear it. Such is the consummate wisdom to be observed.” And this is especially true of the manifestation of God.
(Abdu’l-Baha, Selections from the Writings of Abdu’l-Baha, p. 268)
CHRISTIANITY: Hebrews 5:11 “We have many things to say, (but) hard (is it) to be uttered, seeing (that) ye are dull of hearing.” 5:12 “For when for the time ye ought to be teachers, ye have need that one teach you again, which be the first principles of the oracles of God, (teachers of God); and are become such as have need of milk, and not of strong meat.” Hebrews 5:13 “For every one that useth milk is unskillful in the word of righteousness: for he is a babe.” 5:14 “But strong meat belongeth to them that are of full age, even those who by reason of use have their senses exercised to discern both good and evil.”
BAHA’I FAITH: “The sayings of Him Who is the Spirit (Jesus Christ) unnumbered significances lie concealed. Unto many things did He refer, but as He found none possessed of a hearing ear or a seeing eye He chose to conceal most of these things. Even as He saith: ‘But ye cannot bear them now.’ That Dawning-Place of Revelation saith that on that Day He Who is the Promised One will reveal the things which are to come. Accordingly in the Kitáb-i-Aqdas, and in the Tablets to the Kings, and in the Lawh-i-Ra’ís, and in the Lawh-i-Fu’ád, most of the things which have come to pass on this earth have been announced and prophesied by the Most Sublime Pen.”
(Baha’u’llah, Epistle to the Son of the Wolf, p. 147)
BABI RELIGION: “Were We to reveal the hidden secrets of that Day, all that dwell on earth and in the heavens would swoon away and die.” Again we hear, now from Shoghi Effendi, of humanity’s inability to withstand the full measure and potency of God’s Holy Word.
(Shoghi Effendi, God Passes By, p. 154)
JUDAISM: Proverbs 25:2 “It is the glory of God to conceal a thing: but the honour of kings is to search out a matter.” Psalms 107:9 “For He satisfieth the longing soul, and filleth the hungry soul with goodness.”
BAHA’I FAITH: “If the Sun of Truth (God’s manifestation) were suddenly to reveal, at the earliest stages of its (his) manifestation, the full measure of the potencies which the providence of the Almighty hath bestowed upon it (him), the earth of human understanding would waste away and be consumed; for men’s hearts would neither sustain the intensity of its revelation, nor be able to mirror forth the radiance of its light. (Then) dismayed and overpowered, they would cease to exist.” Or, in-other-words, we still cannot bear the full potency of God’s Holy word as His holy manifestations could, in fact, deliver unto us, so His messengers have to give us a watered down version in accordance with our very, limited capacity and not in accordance with their true overall capacity which could, again make the religions of God appear to differ, one from another, do again to the nature of mankind’s very, limited capacity and ability to know and understand God’s Holy Word and message.
(Baha’u’llah, Gleanings from the Writings of Baha’u’llah, p. 87)
ISLAM: “But give glad tidings to those who believe and work righteousness, for they are given things in similitudes: (allegories, parables) for Allah (God) disdains not to use the similitude of things, (for the) lowest, as well as, the highest (of human beings), for those who believe know that it is in truth, from their Lord (Allah).” Allah chooses what men may learn and what they may know; which, we can assume, is in strict accordance with that which men may learn and know, with God’s knowledge being given to them, by God’s manifestations, in increments from the lowest to the highest of beings, in their ability to know and understand Allah’s Holy Word. “But for those who reject faith say: ‘What means Allah by this similitude?’ ‘By this He causes many a man to stray and many He leads into the right path, for (there are many) He causes not to stray, except those who forsake (His path).” “Allah is The Light (The Knowledge, The Splendor) of the heavens and the earth and Allah doth guide whom He wills, (who He chooses), to His Light and Allah doth set forth His message in (His) parables for all mankind and Allah doth know all things.” Allah (God) sets forth His message to men as He, again chooses, not as men choose and decide. “Those who listen to The Word (as Allah instructs His manifestations to reveal it) and follow the best (meaning) in it (who truly comprehend the word): those are the ones whom Allah has guided, and those are the ones (who are) endued with (true) understanding.” “Think ye, if Allah took away your hearing and your sight, and sealed up your hearts, who — a god other than Allah — could restore them to you? See how We explain the Signs by various (symbols):” “Those are they whose hearts, ears, and eyes Allah has sealed up, and they take no heed.”
(The Qur’an (Yusuf Ali tr), Surahs 2, 6, 16, 24 and 39)
ZOROASTRIANISM: “Mazda (God) gives to the prophets His scriptures. The scripture containing the lessons of the prophets are His main instrument to mankind. It lays down the rules and regulations, which brings salvation to mankind. But unless man has (the innate ability) and the goodwill to accept the (real spiritual truths found within the words) of the gospel (and the ability to go beyond the outward symbols) it does not benefit him at all.” Ahura Mazda, through His divine teachers, chooses what men may learn and be taught. He alone chooses what men may know and understand; by His will, but man must, again have the ability to comprehend; to know and hear the word in the first place; “hear the best with your ears, and discern by a pure mind. Choose than, the ought, man by man (every man), for his very own self. Before the great trial comes, wake up to this My counsel.” “One should rely on his very own conviction, and not allow himself to be drifted by the opinions of others.” “To whom than, will this (hidden, mystic gift) of Ours be given, that he may have never-failing food (of the soul and eternal life) forever and ever?” Again, we can see that Ahura Mazda (God) chooses what hidden things we may hear and be taught in the first place; which again relates to our ability or inability to know or comprehend His holy word. So therefore, we are told by Zarathustra (Zoroaster): “I praise, I invoke and I meditate upon The Zend-Avesta.” Thus: “They considered this, too, thus: namely one ought to endeavor most for meditations on the Religion, that is, on the (mysterious) Avesta and Zand;…. for the soul.” Thus, we have to have, in deed, we must have the, all too real, innate ability within our beings and souls to know and understand God’s holy teachings, or why would He have His manifestations open up their mouths to us in the very first place? So that which we cannot yet comprehend will not be given to us at that time, as in all the other religions of Ahura.
(ZOROASTER, The unknown and Hymns of Atharvan pp. 87, 197, The Zend-Avesta, Khorda Avesta – Book of Common Prayer pt. 1 and The Denkard)
HINDUISM: “The Eternal Place, Hath thus hath been opened to thee, This Truth of Truths, this Mystery more hid Than any secret mystery. Meditate! And- as thou wilt- then act!” “The hymn has a mystical meaning.” “The knowledge — lies hidden.” “The hidden truths of religion, embalmed in the ancient Upanishads.” As we can see, here again, Vishnu, Brahma, God’s message has, again been hidden from man and has thus had to be opened and revealed to us, by Krishna, in the first place, or we would never have known of it.
(Hindu, Bhagavad Gita (Edwin Arnold tr) chapter 18, Vedas, Rig Veda – Book 10 and Laws of Manu chapters 11 and 12) (Hindu, Laws of Manu chapter 2 and The Mababharata (R. Dutt, abridged tr))
Hinduism: “Krishna, now will I open unto thee, whose heart Rejects not that last lore, the deepest-concealed, That farthest secret of My Heavens and My Earths, Which but to know shall set thee free from ills.” “Thus hath been opened thee This Truth of Truths, the Mystery more hid Than any secret mystery. Meditate! And- as thou wilt- then act!” “That which was hidden by their love, is made manifest.”
(Hindu, Bhagavad Gita (Edwin Arnold tr) chapters 9, 18 and Upanishads vol. 1, Aitareya-Aranyaka Part 1)
BUDDHISM: “The religious discourses (the messages and teachings of Brahma, Vishnu, God, etc…) are given by myself (Buddha) and all of the other Tathagatas, (all the other divine, teachers and manifestations of God) in response to all the varying needs and faiths of all manner of beings (all mankind).” Clearly Buddha is telling us, that he only shares God’s word and message with mankind in due proportion with the needs and ability, found within mankind, to know and comprehend His word, and mankind’s, innate ability, to handle the message God has to share with man, in the first place; or, in-other-words, God again only gives us what we can know and handle, as with all the other religions of God; which of-course, only makes sense and stands to reason, since a God, Who is Knowledge Itself, would only wish to share with mankind that which he is ready to know and understand, while withholding any and all other information, that is only going to confuse and frustrate man and leave him completely lost and bewildered in his understanding and comprehension of God’s message.
(Buddha, The Lankavatara Sutra)
Buddhism: “The Tathagatas (teachers) do not teach a Dharma that is dependent upon letters. Anyone who teaches a doctrine that is dependent upon letters and words is a mere prattler, because Truth is beyond letters and words and books. This does not mean that words and books never declare what is in conformity with meanings and truths, but it means that words and books are dependent upon discriminations, while meaning and truth are not; moreover, words and books are subject to the interpretation of individual minds” “Words are dependent upon letters and meaning is not. Meaning is apart from existence and non-existence, it has no substratum, it is unborn. The Tathagatas do not teach a Dharma that is dependent upon letters. Anyone who teaches a doctrine that is dependent upon letters and words is a mere prattler, because Truth is beyond letters and words and books.” “Words and books are dependent upon discriminations, while meaning and truth are not; moreover, words and books are subject to the interpretation of individual minds, while meaning and truth are not.” “No one must become attached to the words of the scriptures because even the canonical texts sometimes deviate from their straightforward course owing to the imperfect functioning of sentient minds. Religious discourses (and teachings) are given by myself and other Tathagatas (the other teachers and manifestations of Brahma, God) in response to the varying needs and faiths of all manner of beings, in order to free them from dependence upon the thinking function of the mind-system, but they are not given to take the place of self-realization of The Noble Wisdom. When there is recognition that there is nothing in the world but what is seen of the mind itself, all dualistic discriminations will be discarded and the truth of imagelessness will be understood, and will be seen to be in conformity with meaning rather than with words and letters.” “The ignorant and simple-minded being fascinated with their self-imaginations and erroneous reasonings, keep on dancing and leaping about, but are unable to understand the discourse by words about the truth of self-realization, much less are they able to understand the Truth itself. Clinging to the external world, they cling to the study of books which are a means only, and do not know properly how to ascertain the truth of self-realization, which is Truth unspoiled by the four propositions. Self-realization is an exalted state of inner attainment which transcends all dualistic thinking and which is above the mind-system with its logic, reasoning, theorizing, and illustrations. The Tathagatas discourse to the ignorant, but sustain the Bodhisattvas as they seek self-realization of Noble Wisdom.” “Therefore, let every disciple take good heed not to become attached to words as being in perfect conformity with meaning, because Truth is not in the letters.” (Buddha, Lankavatara Sutra)
SABEANISM:“The name of the great Mystery, the mystic Word, is pronounced upon thee.” “He who partaketh of this bread (pihta) (the spiritual word), put out (for him) will be sinless in the Place of Light, in the Everlasting Abode.” (Sabeanism, Ginza Rba- chapters 43 and 173)
Sabeanism: “I came to the congregation of souls, For The Life (God) sent me, sent me forth. There were some who bought my wares, There those who came to their end and lay down. There were those who bought my wares. The eyes (of such a one) were filled with light, Filled with light were his eyes (On) beholding The Great (One) in the House of Perfection, There were those who did not buy my wares. They went on, reached their end and lay down. they were blind and saw not, Their ears were stopped and they heard not And their hearts were not awakened To behold the Great One in the House of Perfection. As They called them and they answered not, When they call, who will answer them? Because it was given to them but they took not, Who will give to them when they ask?” “Lord of mystic books, Lord of ‘Letters-of-Truth’ The name of the Life and the name of Manda-d-Hiia (Savior God) be pronounced upon thee! The name of the great mystic Wellspring is pronounced upon thee. The name of the great Mystery, the mystic Word, is pronounced upon thee.” (Sabeanism, Ginza Rba- chapters 90, 173 and 410
Sabeanism: “If thou readest, read as it is written. Lord of mystic books, Lord of ‘Letters-of-Truth’ The name of the Life and the name of Manda-d-Hiia be pronounced upon thee! The name of the great mystic Wellspring is pronounced upon thee. The name of the great Mystery, the mystic Word, is pronounced upon thee.” (Sabeanism, Ginza Rba- chapters 70, 173 and 410)