hardening of the heart, n.All

Hardening of the heart (n.) is ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠freedom switched off: sin becomes compulsion, and the guilt is its own punishment.