Isaiah 57:20,21

These words are as awful, as the foregoing were comfortable. But every day's experience showeth, that the one is as sure as the other. When God's judgments and chastisements do not soften, they harden. The same heat which melts wax, makes the clay stoney. Alas! the heart that remains hardened under the calls of grace, will increase in obduracy, and, like the horse's hoof, with increasing years, become more callous. Well may everyone cry out, in the prayer of the Church, From all blindness of heart, good Lord, deliver us!