" . . .So we too have put our faith in Christ Jesus that we may be justified by faith in Christ

Yes, WE TOO. That is to say, even the lawful, moral and devout ought not believe in their own decency and piety. They ought not do so because it is far from trustworthy. Religion that is redemptive never trusts itself. Its gaze is fastened on that which lies away in another direction. It is absorbed in God's work that he has done in his Son Jesus. This work is so thorough, so admirable, so praiseworthy--it is sufficient for God and man.