Gerhard and Walther

Those who trust in their own righteousness and holiness seek salvation in themselves, but I, who find in me nothing worthy of eternal life, flee to Thee as my Saviour. Save me, for I am condemned; have mercy on me, for I am a sinner; justify me, for I am unrighteous; acquit me, for I am under accusation of sin.—Johann Gerhard, Sacred Meditation IV

If a person remains weak in the faith, his faith will finally be overcome and extinguished. Therefore, if he is to remain a Christian, his faith must grow and become firmer. His faith must be built on the Word alone so that he can comfort himself with that mere written Word even when he feels no joy in his heart. Then he will believe in the forgiveness of his sins even when he senses the presence of sin still dwelling in him.—C. F. W. Walther, God Grant It!, p. 746, 7.