Whoever remains in him doesn't sin. Whoever sins hasn't seen him, neither knows him.
Hath not seen him -- RWP: (ouch heōraken auton). Perfect active indicative of horaō. The habit of sin is proof that one has not the vision or the knowledge (egnōken, perfect active also) of Christ. He means, of course, spiritual vision and spiritual knowledge, not the literal sense of horaō in John 1:18; John 20:29.