Abu Huraira reported God’s messenger as saying, “Everyone is born a Muslim, but his parents make him a Jew, a Christian, or a Magian; just as a beast is born whole. Do you find some among them maimed?” Then he was saying, “God’s pattern on which He formed mankind. There is no alteration of God’s creation. That is the true religion.” 1
(Bukhari and Muslim.)
1 Quran, xxx, 30. It is not quite clear whether these words were recited by the Prophet or by Abu Huraira.
‘Abdallah b. ‘Amr reported God’s messenger as saying, “The hearts of all men are between two of the Compassionate’s fingers as if they were one heart which He turns about as He wills.” Then God’s messenger said, “O God, who turnest the hearts, turn our hearts to Thy obedience!”
God’s messenger stood up among us and made five statements, saying, “God does not sleep, as it is unfitting that He should do so; He lowers the scale and raises it up; the deeds done by night are taken up to Him before the day’s deeds are done; the deeds done by day before the night’s deeds are done; His veil is light, if He were to remove it His majesty would burn up all His creation which was reached by His glance.”
I told God’s messenger that I, being a young man, was afraid of committing fornication, and I had no means to enable me to marry a wife. (It was as though he was asking permission to have himself made a eunuch.) He gave me no reply, so I repeated what I had said, but he gave me no reply. I repeated it again, but he gave me no reply. I repeated it once more and the Prophet said, “Abu Huraira, the pen has written all it has to write1 about your destiny, so have yourself made a eunuch on that account, or leave things as they are.”
