Imam Reza (A.S.) Debates a Man
A man, whose name the historians have not mentioned, came in to Imam al-Reza, peace be on him. When the man sat down, he turned to the Imam and asked him: "Son of Allah's Apostle, what is the evidence for the creation of the world?"
The Imam answered him with definite evidence: "You were not, then you have been. You know that you had not created yourself; nor had the like of you created you.