Chapter 3, verses 4 - 5
4 Whosoever committeth sin transgresseth * also the law: for sin is the transgression of the law.
5 And ye know that he was manifested to take away our sins; and in him is no sin.
Jesus was manifested, that is made flesh and blood, took upon himself the form of man and became man and was God at the same time, in order to pay for our sins by his sacrifice of himself upon the cross.
Those who have placed their faith and trust in HIM have their sins already paid for by the blood of Christ. They cannot sin. Why? Because they are seen by God the Father through the BLOOD of Christ and they are white as snow because HIS BLOOD has cleansed them from all sin and unrighteousness.
What a Savior!
Is he yours today?