Don't ever fuck with Yahweh. Whatever you do don't ever fuck with Yahweh. You don't even want to piss this bastard off...
Isaiah 40 through 43
We see a God frequently changing his mind, breaking his promise to Cyrus. What happens when humans break promises? They violate trust and weaken credibility, damage their own reputation, make it harder on themselves when making future promises, as in the old fable of crying wolf. But when a deity breaks a promise people overlook it and they give the deity, in this case Yahweh, another chance! How fucked.