Hardness of heart. Scripture uses this image to describe those who are impenetrably stubborn, those who are unwilling or unable to see God’s glory or to reorient their lives to God’s call and claims. But what causes hardness of heart? Is it always human sin, those things which we have done which ossify our hearts and rigidify our minds? Do tragic accidents sometimes harden us in ways that make it difficult, if not impossible, to remain open to transformation, to sustain a mental, emotional and moral agility?