Whoever remains in him doesn't sin. Whoever sins hasn't seen him, neither knows him.
It does not of itself necessarily mean that he will always do this; that is, it does not prove the doctrine of the perseverance of the saints, but it refers to the adherence to the Saviour as a continuous state of mind, or as having permanency; meaning that there is a life of continued faith in him. It is of a person thus attached to the Saviour that the apostle makes the important declaration in the passage before us, that he does not sin. This is the third argument to show that the child of God should be pure; and the substance of the argument is, that “as a matter of fact” the child of God is not a sinner.