"Holy" is one of those words we generally associate with the "stained glass ghetto" — a word only "church folks" use. That may be true, but it's still a great concept. Every kid knows that you don't eat hot dogs and potato chips on china. Mom's china is reserved for "special company" or "special occasions." Hot dogs are for paper plates and every day, china is for special events. When God is calling us to be holy, he's calling us to be china — something special just for him, and as Peter emphasizes, just like him.