The precise circumstances surrounding this private communication are, in the words of the Bahá’í authority most intimately familiar with the records of the period, “shrouded in an obscurity which future historians will find it difficult to penetrate.”(20) The nature of the declaration may be appreciated in various references which Bahá’u’lláh was to make to His mission in many of His subsequent writings: The purpose underlying all creation is the revelation of this most sublime, this most holy Day, the Day known as the Day of God, in His Books and Scriptures--the Day which all the Prophets, and the Chosen Ones, and the holy ones, have wished to witness.(21) ...this is the Day in which mankind can behold the Face, and hear the Voice, of the Promised One. The Call of God hath been raised, and the light of His countenance hath been lifted up upon men. It behooveth every man to blot out the trace of every idle word from the tablet of his heart, and to gaze, with an open and unbiased mind, on the signs of His Revelation, the proofs of His Mission, and the tokens of His glory.(22) As repeatedly emphasized in Bahá’u’lláh’s exposition of the Báb’s message, the primary purpose of God in revealing His will is to effect a transformation in the character of humankind, to develop within those who respond the moral and spiritual qualities that are latent within human nature: Beautify your tongues, O people, with truthfulness, and adorn your souls with the ornament of honesty. Beware, O people, that ye deal not treacherously with any one. Be ye the trustees of God amongst His creatures, and the emblems of His generosity amidst His people....(23) Illumine and hallow your hearts; let them not be profaned by the thorns of hate or the thistles of malice. Ye dwell in one world, and have been created through the operation of one Will. Blessed is he who mingleth with all men in a spirit of utmost kindliness and love.(24) The aggressive proselytism that had characterized efforts in ages past to promote the cause of religion is declared to be unworthy of the Day of God. Each person who has recognized the Revelation has the obligation to share it with those who he believes are seeking, but to leave the response entirely to his hearers: Show forbearance and benevolence and love to one another. Should any one among you be incapable of grasping a certain truth, or be striving to comprehend it, show forth, when conversing with him, a spirit of extreme kindliness and good-will....(25) The whole duty of man in this Day is to attain that share of the flood of grace which God poureth forth for him. Let none, therefore, consider the largeness or smallness of the receptacle....(26)