Scripture, however, represents man as one who is not only bound, wretched, captive, sick, and dead, but in addition to his other miseries is afflicted, through the agency of Satan his prince, with this misery of blindness, so that he believes himself to be free, happy, unfettered, able, well, and alive. For Satan knows that if men were aware of their misery, he would not be able to retain a single one of them in his kingdom, because God could not but at once pity and succour them in their acknowledged and crying wretchedness, seeing he is so highly extolled throughout Scripture as being near to the contrite in heart [Ps. 34:18], as Christ too declares himself according to Isaiah 61, to have been sent to preach the gospel to the poor and to bind up the brokenhearted [Luke 4:18]. Accordingly, it is Satan’s work to prevent men from recognizing their plight and to keep them presuming that they can do everything they are told. But the work of Moses or a lawgiver is the opposite of this, namely, to make man’s plight plain to him by means of the law and thus to break and confound him by self-knowledge, so as to prepare him for grace and send him to Christ that he may be saved. They are therefore not absurd but emphatically serious and necessary things that are done by the law.
The Bondage of the Will
Luther’s Works Vol. 33