What do Baha’is believe? Baha’is believe what all true religions believe. For example, all religions believe in progressive revelation up to a point. Christians believe the Old Testament and the Gospel, but nothing more. The Muslims believe in the Old Testament, the Gospel, and Muhammud, but not one inch more.
There is only One God and the Manifestations of God prove that each time God renews His covenant with humanity, He does it with a new name. Isaiah 62:2 says: “The nations will see your righteousness, and all kings your Glory; and you will be called by a new name which the mouth of the Lord will designate.”
Baha’is believe that progressive revelation is the instrument of God that creates an ever-advancing civilization. Humanity tends to fall in love with the lamps of God and not the light of God. Imagine a school in which the students refuse to advance to the next class at the end of the year. They all want to stay in Kindergarten, or the first grade because they love their teacher. This is the plight of humanity. They fall in love with the lamp; in this case, the teacher and not the light of a continuing education.