He needs to review and study very carefully what Paul said of himself in Romans 7.
Rom 7:15 For that which I am doing, I do not understand; for I am not practicing what I would like to do, but I am doing the very thing I hate.
Rom 7:16 But if I do the very thing I do not wish to do, I agree with the Law, confessing that it is good.
Rom 7:17 So now, no longer am I the one doing it, but sin which indwells me.
Rom 7:18 For I know that nothing good dwells in me, that is, in my flesh; for the wishing is present in me, but the doing of the good is not.
Rom 7:19 For the good that I wish, I do not do; but I practice the very evil that I do not wish.
Rom 7:20 But if I am doing the very thing I do not wish, I am no longer the one doing it, but sin which dwells in me.
Rom 7:21 I find then the principle that evil is present in me, the one who wishes to do good.
Rom 7:22 For I joyfully concur with the law of God in the inner man,
Paul is speaking of his present life not his former life.