Chapters 13 and 14: If Israelites were “unclean”, they had to show themselves to the priest, and offer a sacrifice. If we are unclean spiritually through mortal sin, we must do the same, and offer our contrition and do penance.
Chapter 16 Their Day of Atonement is somewhat like our Ash Wednesday.
18:22 On homosexual practice. See Romans 1:26-27 and CCC 2357-2359.
19:18 “ Love your neighbor as yourself” quoted in Mt. 19:19.
20:2 Sacrificing children....abortion.
22:19-21 (animal) sacrifice to be “unblemished male” “without defect.” (Prefigures Christ.)
Chapter 23 Required feasts (Passover, Pentecost) mirror our own.
25:23 Everything is God’s; we are merely stewards.
Catholic Doctrine Bible Study