" ... We are in the cycle which began with Adam and whose universal Manifestation is Bahá’u’lláh."

... "Briefly, our claim is that a universal cycle in the world of existence comprises a vast span of time and countless ages and epochs. In such a cycle, the Manifestations of God shine forth in the visible realm until a universal and supreme Manifestation makes the world the focal centre of divine splendours and, through His revelation, brings it to the stage of maturity. The duration of the cycle He ushers in is very long indeed. Other Manifestations will arise in the course of that cycle under His shadow and will renew, according to the needs of the time, certain laws pertaining to material affairs and transactions, but They will remain under His shadow. We are in the cycle which began with Adam and whose universal Manifestation is Bahá’u’lláh."

‘Abdu’l-Bahá, Some Answered Questions