Final answer:
Baha'is recognize Baha'u'llah as the Messenger of God, the founder of the Baha'i Faith, and consider his teachings as vital for the unity of God, religion, and humanity.
Step-by-step explanation:
For Baha'is, the title Messenger of God was assumed by Baha'u'llah, who is the founder of the Baha'i Faith. Baha'u'llah declared his mission to his followers in 1863 after being exiled from his native Persia to Baghdad for his teachings, which were seen as heretical by the dominant Islamic religious authorities. The Baha'i Faith considers Baha'u'llah to be the latest in a line of Messengers of God, which includes figures like Abraham, Moses, Buddha, Jesus, Muhammad, and the Báb, the immediate forerunner to Baha'u'llah. His teachings emphasize the unity of God, the unity of religion, and the unity of humanity, and his followers regard his writings as the Word of God for this era.