We need forgiveness so that we can have a right relationship with God. He died on the cross to pay the penalty for our sins and rose from the grave to purchase a place for us in heaven. Christ bore our sin in His body on the cross. The Bible says the devil believes in God, so believing in God is not saving faith. It means resting upon Christ alone and what He has done rather than upon what you or I have done to get us into heaven.
Faith is like the hand of a beggar receiving the gift of a King.
We don't deserve the gift of eternal life. But we can have it, if we will receive it by faith. You have just read the greatest story ever told about the greatest offer ever made by the greatest Person who ever lived - Jesus Christ. If anyone hears My voice and opens the door, I will come in to him. He comes as Master and King.