1 John 1.8 and Ro. 7.19 do not talk of unfruitful works. Sin is within us all. No one is exempt. It is a life long battle till the Lord takes us home.
Warning about Regi he has no issue with sin does not hate sin, and has no conscious of sin. we should pray for him. He says he cant sin because sin does not exist for himself. Just thought I would save you some trouble