“The entrance of faith into the heart has the effect of making the believer humble in the presence of God and men. Lest we despair when listening in occasionally on our own heart, we must not forget that a poison-root of vanity remains in our heart; but as soon as it begins to stir up vain thoughts in us, we must fight it. A person who does not fight his vanity has no faith and is not a Christian.”
C.F.W. Walther, The Proper Distinction Between Law and Gospel, 212.