Philippians 3:7-9

but what things were gain to me these I counted, on account of Christ, loss. But surely I count also all things to be loss on account of the excellency of the knowledge of Christ Jesus my Lord, on account of whom I have suffered the loss of all, and count them to be filth, that I may gain Christ; and that I may be found in him, not having my righteousness, which would be on the principle of law, but that which is by faith of Christ, the righteousness which is of God through faith