Romans 4:13-15

That famous promise God gave Abraham—that he and his children would possess the earth—was not given because of something Abraham did or would do. It was based on God’s decision to put everything together for him, which Abraham then entered when he believed. If those who get what God gives them only get it by doing everything they are told to do and filling out all the right forms properly signed, that eliminates personal trust completely and turns the promise into an ironclad contract! That’s not a holy promise; that’s a business deal. A contract drawn up by a hard-nosed lawyer and with plenty of fine print only makes sure that you will never be able to collect. But if there is no contract in the first place, simply a promise—and God’s promise at that—you can’t break it.