Jesus still heals , not changes us , sinners  .  Sacred scripture tells us that the just fall seven times a day  .  We pray .." for us sinners "  in the Hail Mary .  Jesus " became sin "  ,  for our sake , such was the divine love for us  .  
Jesus is warning us not to put our trust in our own notions of our "standing "  before God  .  Self righteousness is dangerous because it leads us to forgetting our inclination toward other sorts of sinfulness .