Without reaching the East or West...
Without reaching the East or West, without going under the earth or climbing up the sky and not even have crossed anything to know what is behind you deny what is in them. Does any man of reason deny what he does not know?" The heretic man then said, "No one has ever come up with such statements to me as you have." The Imam (a.s.) then said, "So you are uncertain about Him.
Perhaps He is or may be He does not exist." The heretic man then said, "Perhaps He is." The Imam then said, "O man, one who does not know has no authority over the one who knows. O Egyptian brethren, listen carefully. We have no doubts in the existence of Allah (God). Think about the sun, the moon, the day and the nights follow each other and do not miss their turns or become confused. They each have its place and do not have any choice.
If they had any other choice they would not come back again. If they had a choice the day would not end with night and the night would not end in the day. They are forced to continue, O Egyptian brethren, I swear byAllah (God). The One who has forced them is stronger then them and greater. What people speak of and you guess it is (dahr) motionless time if it was so, then when it would take them away it would not return them and if time have returned them then why it is not taking them away?
These things, O Egyptian brethren, are compelled. Why the sky is up high and why the earth is low? Why the sky does not fall down on earth?
Why the earth does not flow one layer over the other and the two do not stick to each other and why those on it do not stick to it?" The man then said, "God their Lord has made them to hold together." Hisham has said, "He professed belief in God in the presence of Imam abu 'Abdallah (a.s.)." "Humran then said to the Imam, "May Allah take my soul in service for your cause, if heretics profess belief in Allah (God) before you it is because the unbelievers converted to faith because of your father." The man who had just professed belief in Allah requested Imam abu 'Abdallah (a.s.) to allow him to become one of his students.
The Imam then asked Hisham to teach him. Hisham taught him well and he became a teacher for the people in Syria and Egypt. His purification was very well and the Imam (a.s.) became happy with him." H 210, Ch.