"Does God expect us to be holy? In Leviticus 11:44, 45, God says "consecrate yourselves, and you shall be holy; for I am holy." In all of this, God is teaching His people to live antithetically. That is, He is using these clean and unclean distinctions to separate Israel from other idolatrous nations who have no such restrictions, and He is illustrating by these prescriptions that His people must learn to live His way. Through dietary laws and rituals, God is teaching them the reality of living His way in everything. They are being taught to obey God in every seemingly mundane area of life, so as to learn how crucial obedience is. Sacrifices, rituals, diet, and even clothing and cooking are all carefully ordered by God to teach them that they are to live differently from everyone else. This is to be an external illustration for the separation from sin in their hearts. Because the Lord is their God, they are to be utterly distinct. In v. 44, for the first time the statement "I am the LORD your God" is made as a reason for the required separation and holiness. After this verse, that phrase is mentioned about 50 more times in this book alone, along with the equally instructive claim, "I am holy." Because God is holy and is their God, the people are to be holy in outward ceremonial behavior as an external expression of the greater necessity of heart holiness. The connection between ceremonial holiness carries over into personal holiness. The only motivation given for all these laws is to learn to be holy because God is holy. The holiness theme is central to Leviticus (see 10:3; 19:2; 20:7, 26; 21:6-8)."