In spite of all this He never ceased for one instant His proclamation of the greatness of the Cause of God. He manifested such virtue, knowledge and perfections that He became a wonder to all the people of Persia. So much so that in Ṭihrán, Ba_gh_dád, Constantinople, Rumelia, and even in Akká, every one of the learned and scientific men who entered His presence, whether friend or enemy, never failed to receive the most sufficient and convincing answer to whatever question was propounded. All frequently acknowledged that He was alone and unique in all perfections. It often happened that in Ba_gh_dád certain Muḥammadan ‘ulamá, Jewish rabbis and Christians met together with some European scholars, in a blessed reunion: each one had some question to propose, and although they were possessed of varying degrees of culture, they each heard a sufficient and convincing reply, and retired satisfied. Even the Persian ‘ulamá who were at Karbilá and Najaf chose a wise man whom they sent on a mission to Him; his name was Mullá Ḥasan ‘Amú. He came into the Holy Presence, and proposed a number of questions on behalf of the ‘ulamá, to which Bahá’u’lláh replied. Then Ḥasan ‘Amú said, “The ‘ulamá recognize without hesitation and confess the knowledge and virtue of Bahá’u’lláh, and they are unanimously convinced that in all learning he has no peer or equal; and it is also evident that he has never studied or acquired this learning; but still the ‘ulamá say, ‘We are not contented with this; we do not acknowledge the reality of his mission by virtue of his wisdom and righteousness. Therefore, we ask him to show us a miracle in order to satisfy and tranquilize our hearts.’” Bahá’u’lláh replied, “Although you have no right to ask this, for God should test His creatures, and they should not test God, still I allow and accept this request. But the Cause of God is not a theatrical display that is presented every hour, of which some new diversion may be asked for every day. If it were thus, the Cause of God would become mere child’s play. “The ‘ulamás must, therefore, assemble, and, with one accord, choose one miracle, and write that, after the performance of this miracle they will no longer entertain doubts about Me, and that all will acknowledge and confess the truth of My Cause. Let them seal this paper, and bring it to Me. This must be the accepted criterion: if the miracle is performed, no doubt will remain for them; and if not, We shall be convicted of imposture.” The learned man, Ḥasan ‘Amú, rose and replied, “There is no more to be said”; he then kissed the knee of the Blessed One although he was not a believer, and went. He gathered the ‘ulamá and gave them the sacred message. They consulted together and said, “This man is an enchanter; perhaps he will perform an enchantment, and then we shall have nothing more to say.” Acting on this belief, they did not dare to push the matter further.(19)