As someone who has experienced a tremendous amount of loss, grief, pain, and suffering I was excited for Tim's book on suffering to arrive. Tim Keller has also suffered much, and thus speaks with credibility as a fellow sufferer in the journey of life where there are many hills and valleys along the way.
Keller divides the book into three parts based on the biblical metaphor where suffering is described as a "fiery furnace." Fire is an image used throughout the Bible as an image describing the torment and pain of suffering. The Bible speaks frequently of troubles and trials as "walking through the fire," a "fiery ordeal", and a "fiery furnace."
Therefore, Keller builds his themes around this image. In Part One Keller considers the furnace from the outside of us. He tackles "the phenomenon of human suffering, as well as the various ways that different cultures, religions, and eras in history have sought to help people face and get through it [suffering]."
In part two Keller moves away from the theoretical realm and begins to hone in on the personal and character issues that are developed when we suffer. He seeks to demonstrate that the common ways we handle suffering via avoidance, denial, and despair are essentially to waste our suffering. On the other hand, the Bible presents a balanced view in how to handle suffering in a step by step fashion. Biblical truth is always balanced and faces hardships head-on because these are the fires that God uses in our lives to mold our character and make us more like Christ.