In today's first reading from Acts 3, Peter said to the people, "The author of life you put to death, but God raised him from the dead; of this we are witnesses. Now I know, brothers, that you acted out of ignorance, just as your leaders did; but God has thus brought to fulfillment what he had announced beforehand through the mouth of all the prophets, that his Christ would suffer. Repent, therefore, and be converted, that your sins may be wiped away." First of all, Peter was right in calling Christ the author of life, the Resurrection being the proof. To rise again from the dead would be impossible unless you are the author of life. Secondly, it is noteworthy that Christ suffered and died so that those who played a part in putting him to death could still repent and be saved. Such is God's great mercy.