Taking your posted list of scripture is only half of the story (the negative side at that). It brings me to the same place as the disciples who asked Christ, "Who then can be saved?" Christ said to them, " with men, this is impossible but with God all things are possible". The lesson being we can't do one single thing to be saved, yet, we can be saved. How? only through the Grace of God. How? By faith. Not faith and go to church, faith and be nice, faith and not sin (which is impossible to start with),faith and beg for forgiveness. Repent, yes. Every sin you ever committed , will commit today, and in the future has already been forgiving and was nailed to that cross at Calvary. It must be insulting to the Lord when Christians come to him begging for the very forgiveness he died for 2000 years ago.