In the book Qasasul Ulama there is an anecdote of the period of Abbas the Safawid. A Christian king sent a messenger to Abbas with the message that he may be given a chance to debate with Muslim scholars and if he defeats the Muslim scholars they must all accept Christianity. Now the person sent by the Christian king had some powers by which he was able to guess accurately what others held in their fists. The scholars were invited to debate with him and they included Mulla Mohsin Faiz. When the debate began Mulla Mohsin remarked that the Christian king has sent an ordinary man instead of a religious scholar for debate. The envoy brushed the remark aside and told him to hide something in his fist so that he can prove his miraculous powers.
Mulla Mohsin kept the tasbih made of dust from Imam Husain (a.s.)’s grave in his fist and challenged him to guess. The man thought for sometime but kept quiet. When Mulla urged him to speak up he said, “According to my knowledge there is a piece of Paradise soil in your hand but I am astonished as to where it was and how it came into your hands.”
Mulla Mohsin said, “You are correct! It is the dust from the grave of Imam Husain (a.s.) who was the grandson of our Prophet (S). Your statement itself proves that the Imam of Muslims was on the right. Hence, you must accept Islam.”
The Christian followed his conscience and became a Muslim. A very suitable method was employed by the late Mulla Faiz to guide the Christian towards salvation.