Where does 'Equality' Come from?

There is a great deal of debate and talk about equality, but the one question no one ever asks is: what is the origin of equality? By whose standards does equality come from? We seem to think that we can use human standards, however, humans have shown that they cannot agree on what is the meaning of equality. Thus, it appears, that equality cannot be found by using human standards. There must be something else to provide for equality, or else, equality has no meaning.