"This is the changeless Faith of God, eternal in the past, eternal in the future." ( Bahá'u'lláh)
In this Revelation the concepts of the past are brought to a new level of understanding, and the social laws, changed to suit the age now dawning, are designed to carry humanity forward into a world civilization the splendours of which can as yet be scarcely imagined.
In its affirmation of the validity of the great religions of the past, the Kitáb-i-Aqdas reiterates those eternal truths enunciated by all the Divine Messengers: the unity of God, love of one's neighbour, and the moral purpose of earthly life. (Universal House of Justice)
I believe that the Prophet/Founders of major religions were all from God and that God's Revelation is progressive and continuing. Baha'u'llah is the latest of God's Messengers and fulfills prophecies from other religions.
I've been preparing a commentary comparing the text of the Tanaka, the Gospel, the Qur'an and the Bahá'í Writings. I've identified similarities of expression (similar phrases and the way they are used), symbolism (the same meanings for various images: angels, trumpets, etc.) and similarities in the instructions from God (how to search for God, what standard does God use, etc.) and similarities in prophecy (both in expression and in content). I'm looking for comments.