2 Quotes by Ibn Al-Qayyim

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.

And verily for everything that a slave loses there is a substitute, but the one who loses Allah(God) will never find anything to replace Him.