A great stumbling block to many.. is the difference between the Revelations given by the different Prophets. What is commanded by one is forbidden by another; how then can both be right, how can both be claiming the Will of God? Surely the Truth is One and cannot change. Yes, the Absolute Truth is One and cannot change, but the Absolute Truth is infinitely beyond the present range of human understanding, and our conceptions of it must constantly change. Our earlier, imperfect ideas will be by the Grace of God replaced, as time goes on, by more and more adequate conceptions (122:2)

"O people! Words are revealed according to capacity so that the beginners may make progress. The milk must be given according to measure so that the babe of the world may enter into the Realm of Grandeur and be established in the Court of Unity." (Baha'u'llah - Tablet) (122:3)

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Baha'u'llah & the New Era
J. Esslemont