Musar zu Jirmejahu 13:16

The first is that one should grasp the quality of remorse, and put it into his heart that there is great punishment for him who has transgressed the commandment of the Great King. As the Scriptures say, "Give glory to the Lord your God, before it grow dark" (Jer. 13:16). And when a man thinks about the dark days which will reach the one who has sinned against the God of Jacob, then he will be exceedingly afraid and he will have remorse for his deeds. And he will say in his heart, "What have I done? How is it that the fear of God was not always before my eyes? And how is it that I did not fear punishment for my wrongdoing? And how is it that I could not rule over my evil inclination when tempted by the pleasure of one moment? And how have I sullied my pure soul, the soul which was breathed into me from the Source of Holiness? And how have I changed the Great World that stands and endures forever and ever for this transitory little world? And how is it that I did not remember the day of death which will leave my soul nothing but my corpse and a bit of earth?" And he should multiply in his heart thoughts concerning this matter. And this is the subject of which Jeremiah spoke, "No man repenteth of his wickedness saying, 'What have I done' " (Jer. 8:6).