When delivering the glad tidings, speak out and say: the Promised One of all the world’s peoples hath now been made manifest. For each and every people, and every religion, await a Promised One, and Bahá’u’lláh is that One Who is awaited by all; and therefore the Cause of Bahá’u’lláh will bring about the oneness of mankind, and the tabernacle of unity will be upraised on the heights of the world, and the banners of the universality of all humankind will be unfurled on the peaks of the earth. When thou dost loose thy tongue to deliver this great good news, this will become the means of teaching the people.
‘Abdu’l-Baha’, Selections #65