Why do we hang onto our attempts at righteousness through our own efforts? Christ died on the cross to make our own efforts towards righteousness obsolete. In Hebrews 8:13 Paul says: By calling this covenant “new,” he has made the first one obsolete; and what is obsolete and aging will soon disappear. Since Christ died on the cross for our sins we no longer have to strive for perfection through our own works because Christ has made us perfect in God’s eyes through His sacrifice on the cross for us.