My little children, I write these things to you so that you may not sin. If anyone sins, we have a Counselor{Greek Parakleton: Counselor, Helper, Intercessor, Advocate, and Comfortor.} with the Father, Jesus Christ, the righteous.
The conditional particle, if, ought to be viewed as causal; for it cannot be but that we sin. In short, John means, that we are not only called away from sin by the gospel, because God invites us to himself, and offers to us the Spirit of regeneration, but that a provision is made for miserable sinners, that they may have God always propitious to them, and that the sins by which they are entangled, do not prevent them from becoming just, because they have a Mediator to reconcile them to God. But in order to shew how we return into favor with God, he says that Christ is our advocate; for he appears before God for this end, that he may exercise towards us the power and efficacy of his sacrifice. That this may be better understood, I will speak more homely. The intercession of Christ is a continual application of his death for our salvation. That God then does not impute to us our sins, this comes to us, because he has regard to Christ as intercessor. 