" Notice, there was a man who was once real and alive and in love. But after a series of blows, his humanity was reduced to efficiency. He became a sort of machine—a hollow man. At first he did not even notice, for his condition made him an excellent woodman, as any person can become productive like a machine when he forgoes his heart. "

― John Eldredge , Waking the Dead: The Glory of a Heart Fully Alive