Your story, your interpretations, your motivations, and your beliefs come out of your heart. This is the center of your life. The heart oversees the “whys.” Why work? Why play? Why love? It is the defining feature of humanness.
Above all else, guard your heart, for it is the wellspring of life. (Prov. 4:23)
Out of the overflow of the heart the mouth speaks. (Matt. 12:34)
The good man brings good things out of the good stored up in his heart, and the evil man brings evil things out of the evil stored up in his heart. (Luke 6:45)
As you can guess by this point, when you get to the farthest reaches of the human heart, you will find that it has everything to do with God. All life is lived coram deo (before the face of God).
Ed Welch, Depression: Looking Up from the Stubborn Darkness, p. 109.