“Seize your chance, inasmuch as a fleeting moment in this Day excelleth centuries of a bygone age… Neither sun nor moon hath witnessed a day such as this…

“Be fair, ye peoples of the world;” He thus appeals to mankind, “is it meet and seemly for you to question the authority of one Whose presence ‘He Who conversed with God’ (Moses) hath longed to attain, the beauty of Whose countenance ‘God’s Well-beloved’ (Muḥammad) had yearned to behold, through the potency of Whose love the ‘Spirit of God’ (Jesus) ascended to heaven, for Whose sake the ‘Primal Point’ (the Báb) offered up His life?” “Seize your chance,” He admonishes His followers, “inasmuch as a fleeting moment in this Day excelleth centuries of a bygone age… Neither sun nor moon hath witnessed a day such as this… It is evident that every age in which a Manifestation of God hath lived is divinely ordained and may, in a sense, be characterized as God’s appointed Day. This Day, however, is unique and is to be distinguished from those that have preceded it. The designation ‘Seal of the Prophets’ fully reveals and demonstrates its high station.”

Bahá’u’lláh cited by Shoghi Effendi

(The World Order of Bahá’u’lláh)
www.bahai.org/r/628755980