Read: Acts 2:38-41
Peter replied, Repent and be baptized, every one of you, in the name of Jesus Christ for the forgiveness of your sins. And you will receive the gift of the Holy Spirit. Acts 2:38
The Apostle Peter is answering this question, What shall we do? He acknowledges that there is something to be done. When you come to the place where you understand that Jesus is Lord, and that you are out of harmony with all his purposes and his life, then there is something to do. There are two things you need to do, Peter says, and then one thing God will do.
You need, first, to repent. Repent is a word that is greatly misunderstood. Most people think repentance means that you feel sorry, and you begin to cry and weep. That has nothing to do with repentance. You may feel sorry, and you may begin to weep and cry, but that is not necessary, and it does not mean that you have repented. Repent is a word which means to change your mind, to change your thinking. You have been thinking that everything was all right with you and all is well. You have been thinking that Jesus is nothing but a great teacher, or a great prophet, but that he is not the Son of God, and he is not the Lord of glory, the Lord of all the earth; well, think again. Repent — change your mind, get in tune with reality, line up with things the way they really are, is what Peter is saying. You have been kidding yourself, you have been deluded, you have been fooled; well, change your mind. Jesus of Nazareth, the Son of God — repent and put him where he belongs in your life.