All the prophets testify about him that everyone who believes in him receives forgiveness of sins through his name. Acts 10:43
You may not appreciate this fully, but everything that Jesus did was predicted by the prophets. Long before he ever came, what he would be like and what he would do was written down. Every prophet bore witness to this one fact: The only way you could ever find forgiveness of sins is by believing in him. That is the great, final, glorious thrust of the gospel. The good news is that men have been given a way to be forgiven of their sins.
That is the basic need of every human heart. Each of us suffers from the terrible consciousness of guilt. We are guilty people; and we know it. That is what makes us so restless. That is why often we cannot stand to be alone with ourselves, because we are afraid of that sense of guilt which oppresses us. So the prime need of our lives is to be forgiven, to have nothing in the past to worry about, to have nothing that makes us uncertain of the future and, especially, nothing which makes us unwilling to appear before God. Through Jesus Christ sins are forgiven.