When God justifies us, he charges our sins to Jesus and He credits the righteousness of Jesus to us. We aren't justified by our performance, rather by faith, the perfect righteousness of Jesus becomes ours.
In his book, The Incomparable Christ, John Stott invites you to view Jesus from four perspectives: The Original Jesus, The Ecclesiastical Jesus, The Influential Jesus, and The Eternal Jesus. You will find in these pages the Jesus who is like no other—worthy of your worship, your confession, and your obedience, as you follow the One who meets the longings and hopes of every human heart.