When you become a Christian by believing in Jesus for eternal life, one of the first things that happens to you is the Holy Spirit comes in and lives with in you, and in that moment, He washes you, He cleanses you, He purifies you of all sin, and provides us with the power to have victory over future sin. (redeeminggod.com)
At the cross, Jesus took the wrath of God which we all deserved and bore the sins of the world, i.e. our past, present and future sins once and for all. (religion.blogs.cnn.com)
God took on all that weight and brutality brought about by sin and forgave man for all past, present and future sins. (religion.blogs.cnn.com)