Keller addresses three important principles about Christian conversion. First, we are not capable of finding God unless we experience spiritual conversion initiated by God. Second, Christian conversion is not a call to morality and religion; it is a challenge to morality and religion. Third, conversion happens by the transformation of the Holy Spirit.

The Christian understanding of hell gives us insight into the danger of our own hearts. It also gives us resources to live in peace in the world, and to know the love of God who suffered hell for us.