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 GrahamSomeday your life will be over, no matter how much attention you give to your health. Will you look back with regret, because you nourished your body but starved your soul?
Billy Graham