One day, Jesus and Satan decided to settle which one of them was the best programmer. God was chosen to be the judge.
Jesus and Satan got 10 hours to create the best program they could for the PC.
When 10 hours had passed, the power suddenly went out, and all the data disappeared from both monitors. Moments later, the power came back on.
On Jesus's monitor, all the data had returned to its previous state, whereas Satan's monitor remained blank.
Satan got really angry and complained to God.
God was quiet for a moment, then he laughed and said, "Jesus saves!"