If we confess our sins, he is faithful and righteous to forgive us the sins, and to cleanse us from all unrighteousness.
It is difficult for man's ego to admit blame and guilt, society as a whole being hardly capable of any such admission.  More and more, the trend is to deny sin exists.  Drunkards have merely contracted an unfortunate disease, alcoholism!  Adulterers and philanderers are schizophrenic!  Thieves, murderers, outlaws, etc. are not criminals at all, but anti-social, a state induced by society itself. Sinful behavior is not that at all, but the natural response to one's heredity, environment, deprivation or other things beyond the sinner's control.  The apostolic word for all such thinking is "self-deception."