Leviticus 5:1–19 (ESV)

1 “If anyone sins in that he hears a public adjuration to testify, and though he is a witness, whether he has seen or come to know the matter, yet does not speak, he shall bear his iniquity;

The study of the specific sins help the nation understand and appreciate the nature of the Lord’s holiness. Furthermore, this chapter introduces the requirement for confession of sin. This forms a crucial element of the sin offering. Without it, the offering was meaningless.