Proverbs 28:13

He who covers his sins will not prosper, but whoever confesses and forsakes them will have mercy. 

God gives us instructions to confess and repent when we sin.  Get right back under His protection and reverse the course in the wrong direction.  The only perfect person to live on this earth was Jesus, and we are to learn from His example.  Which means there will be practice involved and times we sin and need to repent.