What Should Frighten You?

We have to know that there’s a dread of Hashem. This includes the fear of facing Him in the World to Come, coming face-to-face with Him, the greatest dread of all. One of the functions of this dread is to think of Gehinom. Every Jew must train himself to put into his thoughts as a permanent addition that there is a fearsome Gehinom going on all the time. — Fundamental Principles (#E-201)