How does the Law of Moses show a sinner that he is a sinner? It does so:
1. By defining sin (Romans 3:19-20);
2. By giving sin the character of a transgression (Romans 4:15; 5:13-14, 20; 7:7);
3. By demanding nothing less than absolute perfection (Leviticus 18:5; 19:2);
4. By commanding what it cannot give (Romans 7:14-8:4);
5. By cursing with a full curse a single infraction (Deuteronomy 27:26; Galatians 3:10-14; James 2:10-11);
6. By exciting the very sin it abhors (Romans 7:7-13) (we are so bad that merely being confronted with good makes us want to do bad “worse than ever!”);
7. By probing deep below the surface (Romans 7:7-13) (“. . . the pool of his heart looked like a spring of sweet water. The law was the staff that stirred it up and showed it to be nothing but mud at the bottom and full of all hideous reptiles”); and
8. By resisting our resolutions (Romans 7:14-25).
The Law shows us we need a Savior and thus “is our schoolmaster to bring us unto Christ” (Galatians 3:24).