A friend asked how the teachings of Bahá’u’lláh contrasted with the teachings of Jesus Christ. “The teachings are the same.” declared ‘Abdu’l-Bahá; “It is the same foundation and the same temple. Truth is one, and without division. The teachings of Jesus are in a concentrated form. Men do not agree to this day as to the meaning of many of His sayings. His teachings are as a flower in the bud. Today, the bud is unfolding into a flower! Bahá’u’lláh has expanded and fulfilled the teachings, and has applied them in detail to the whole world.
(‘Abdu’l-Bahá, ‘Abdu’l-Bahá in London, p. 92-93)
We testify that when He [Jesus] came into the world, He shed the splendor of His glory upon all created things. Through Him the leper recovered from the leprosy of perversity and ignorance. Through Him, the unchaste and wayward were healed. Through His power, born of Almighty God, the eyes of the blind were opened, and the soul of the sinner sanctified.
(Bahá’u’lláh, Gleanings from the Writings of Bahá’u’lláh, p. 86)