When Scripture talks about the heart, it's not talking about that life-sustaining muscle. It's talking about our entire inner being. The heart is the seat of our emotions, the seat of decisive action, and the seat of belief (as well as doubt).
Billy GrahamDon't let failure or disappointment cut you off from God or make you think that the future is hopeless. When God closes one door, He often opens another door - if we seek it.
Billy Graham