If we say that we have no sin, we deceive ourselves, and the truth is not in us.

If we say that we have no sin, we are false to ourselves and there is nothing true in us.

Εαν ειπωμεν οτι αμαρτιαν δεν εχομεν, εαυτους πλανωμεν και η αληθεια δεν ειναι εν ημιν.

If we say that we have no sin, we deceive ourselves, and the truth is not in us.