I've never had to lay awake at night wondering if God was going to come through on a promise. Have you? I'm willing to bet my life that you haven't, and you know why? Because he's completely trustworthy. In fact, he cares more about you than you could possibly even care about yourself. He's your biggest fan.
God is not a man, so he does not lie. He is not human, so he does not change his mind. Has he ever spoken and failed to act? Has he ever promised and not carried through?