Bible Notes Online - Leviticus 11 - ESV
Commentary

v1-3: The explanation about clean and unclean animals; this was not new; see Gen 7.2-3.

Clean animals had a split (cloven) hoof, signifying a separated walk, a life of holiness and distinctiveness; and they chewed the cud, signifying meditation of Christ and the Scriptures.

v4-7: The Scripture lists those animals which "part qualify", and therefore are unclean. They are specified so that they can be avoided. In the same way, the Bible lists things that may not be thought of as sins, so that they can be avoided, see Phil 2.3,14.

v20: Insects that creep on all fours are unclean, and detestable (v41 also); this speaks of scheming and deceit. In contrast, those animals that hop, i.e: ready for action, and having little contact with the earth, are clean.

v21: In contrast, those animals that hop, i.e: ready for action, and having little contact with the earth, are clean.

v24-25: The problem was that it was all too easy to become unclean. The people had to remain unclean until evening, i.e: the end of the day.

v26-31: “unclean until evening;” more animals to be avoided.

v32-40: The problem of spreading contamination; 1 Cor 5.6; Matt 15.11,17-20. The response of the godly was to be discerning and careful (v47).

v41-43: Animals that walk around on the ground, on all fours, on many feet, or on its belly, were unclean. Again, the lesson is that contact with the ground speaks of worldliness, and a love for the things of this life.

v44-45: God is holy, therefore His people must be holy. Here, as elsewhere, He has made it clear what is acceptable, and what is unacceptable. Since we belong to God, that in itself is a motivation to break with sin and to maintain holiness of life.

Just as God laid down regulations about, for example, worship, so He added instructions concerning clean and unclean animals. Here is the opportunity for the worshipper of God to live a practical holy life.