Many cultures believe in a supreme being or beings who rule the world. Yet the God of the Hebrew Bible creates the world not on a whim, as happens in other cultures, but for a moral purpose (see Genesis, chap. 1). He then becomes known to certain people, beginning with Abraham. He makes a covenant with him and promises to redeem his offspring. Known also as the God of Israel (See God, Names of), this God becomes the center of both Christianity and Islam, faiths which, together with Judaism, are considered the three major monotheistic religions of the world. They all accept the one single transcendental God who does not have any human or physical qualities and is beyond human understanding. When Moses tries to identify God, he is told, “I am what I am.” In other words, God is nameless and remains outside human experience, while in effect, as attested by the Book of Psalms, nature, history, and human experience reveal God’s existence and power.