April 19

O people of God! Great is the Day and mighty the Call! In one of Our Tablets We have revealed these exalted words: ‘Were the world of the spirit to be wholly converted into the sense of hearing, it could then claim to be worthy to hearken unto the Voice that calleth from the Supreme Horizon; for otherwise, these ears that are defiled with lying tales have never been, nor are they now, fit to hear it.’ Well is it with them that hearken; and woe betide the wayward. 
(Baha’u’llah, ‘Tablets of Baha’u’llah revealed after the Kitab-i-Aqdas’)