Theodoret of Cyrus
Why does God prohibit those who have come into contact with a man who emits seed, a leper, a corpse, or anything deemed impure, from consuming sacrificial meat? He heals significant afflictions through these seemingly minor matters. If the law renders the natural state unclean, how much more does it taint what is moral, which is rightly considered unlawful? This understanding of the law is clarified by the subsequent instruction. The command to offer every fat upon the altar includes the fat of the corpse and that of animals intended for human sustenance (Leviticus 7:24). Clearly, anyone who has touched these items would be deemed unclean (Lev. 7:24). Thus, it is clear that God established other regulations with a specific intent in mind.