Each manifestation allegedly builds on the previous ones and brings new information and insight to man. Thus God's message to man is progressively revealed and enhanced over time through different prophets. Though each manifestation is considered legitimate and appropriate for its time, in some sense the latter always overrules the former. Baha'is teach that Baha'u'llah is the manifestation to humanity for this time. The Baha'i faith teaches the oneness of God, the oneness of all religions, and the oneness of mankind.
Unity is sought, taught, and preached today and is the goal for tomorrow.
The mission of Baha'i life is to bring to fruition the unity of all mankind in a divine civilization based on the teachings of Baha'u'llah. Pray every day. Observe the Baha'i Fast from sunrise to sunset each day from March 2 through 21. Consider work as worship. Teach the Cause of God.