Hardness of heart. Scripture uses this image to describe those who are impenetrably stubborn, those who are unwilling or unable to see Godâ€™s glory or to reorient their lives to Godâ€™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? Do the effects of systemic sin, as well as the effects of personal sin done to us rather than by us, cultivate wounds that may harden us and erupt into further destructiveness?