Mufaddal ibn Umar was a loyal companion of Imam Jafar Sadiq (asws). One day Mufaddal was sitting in Masjid al Nabwi when an atheist entered and began discussing the non existence of the Creator of the Universe. Mufaddal attempted to debate the atheist but was unable to. Then he left and went to Imam Jafar Sadiq (asws) to ask how to reply to the atheist regarding the existence of the Creator of the Universe. This is Mufaddal's narration of the reply Imam Jafar Sadiq (asws) gave to him regarding the existence of the Creator of the Universe.