The Greek word translated as Advocate in this verse is parakletos. It means someone called to one's aid; someone who pleads another's cause before a judge; a counsel for defense, a legal assistant, an advocate, and a helper. Many people have never fully grasped that Jesus Christ is on our side. Just like a defense lawyer, He pleads our case. We should not sin, because sin is harmful to us and to others. But even if we do sin, Jesus Christ is still on our side. He is not accusing us, but defending us on the basis of His sacrifice at Calvary. The devil is the one who accuses us, who brings up all our sins and shortcomings, and tells us we don't deserve anything good.  Jesus is not the one who is trying to find us guilty. He remains our Savior!  Jesus not only paid the penalty for all our sins by shedding His own blood, but now He is our advocate pleading our case so that we might enjoy all the blessings He purchased for us regardless of our failures.  Jesus took our place, suffering what we deserve, so that we might receive, as a free gift which is grace and mercy.

                                 
 For He made Him who knew no sin to be sin for us, that we might become the righteousness of God in Him (2 Corinthians 5:21).