“When God is here spoken of as hardening some of the children of men, it is not to be understood that God by any positive efficiency hardens any man's heart. There is no positive act in God, as though he put forth any power to harden the heart. To suppose any such thing would be to make God the immediate author of sin. God is said to harden men in two ways: by withholding the powerful influences of his Spirit, without which their hearts will remain hardened, and grow harder and harder; in this sense he hardens them, as he leaves them to hardness. And again, by ordering those things in his providence which, through the abuse of their corruption, become the occasion of their hardening. Thus God sends his word and ordinances to men which, by their abuse, prove an occasion of their hardening.”
“The slave is not afflicted with a punishment greater than the hardening of the heart and being distant from Allah. For the Fire was created to melt the hardened heart. The most distant heart from Allah is the heart which is hardened. If the heart becomes hardened, the eye becomes dry.”
“No man will say, "There is no God" 'till he is so hardened in sin that it hasbecome his interest that there should be none to call him to account.”
“Harden your heart.”
“Whenever the conviction of God’s Spirit comes there is the softening of the whole nature to obey; but if the obedience is not instant there will come a metallic hardening and a corrupting of the guidance of God.”
“But responsibility hardens the heart. It must.”