As someone who has struggled with doubt, I found this book very helpful. Some people view doubt as shameful and disloyal to our faith while others become preoccupied with doubt. Both of these approaches are unhelpful. Instead, McGrath argues that doubt is not necessarily a symptom of spiritual weakness, but an indication of spiritual growing pains. With kindly insight, he writes, "For, seen properly, doubt is not a threat to faith but a reminder of how fragile a hold we have on our knowledge of God- and how gracious God is in having revealed himself to us" (pg. 148).
McGrath takes a good look at what doubt is and isn't. Doubt is not skepticism or unbelief, but is "asking questions or voicing uncertainties from the standpoint of faith (pg. 14). Doubt is not only found in the Christian faith. People of all worldviews search for absolute certainty, and this search will inevitably fail because no one knows important things such as divinity, human nature, and our destiny with absolute certainty. Whether you are a Christian, Muslim, Hindu, or atheist, you will probably encounter doubt when your search for absolute certainty fails.
McGrath also looks at some of the personal and emotional aspects of doubt. Often doubt arises from a broken background. Sometimes doubt in God arises from a doubting of ourselves. Sometimes it comes from a desire to serve two masters and being unwilling to break with one. Other times, doubt simply indicates a lack of trust.
No matter where doubt arises from, it should be conquered. One helpful tip for the battle is not to focus on doubt or on overcoming it. "Instead, get to work on renewing, deepening and consolidating your faith in God (pg. 122). Work on strengthening spiritual disciplines, and make sure to put doubt in proper perspective.
Doubt often comes during periods of suffering or spiritual dryness. In these times, God may seem absent. In reality, He is working in a hidden and mysterious way to transform your situation in a totally unexpected way. We often forget this because we do not see the big picture. Near the end of the book, McGrath encourages those experiencing doubt and suffering to see their experience in the same way the apostles came to see the crucifixion of Jesus. He writes,
"Just as faith sees the crucifixion in terms of the resurrection, so we must view the perplexities of the world in the light of its future transformation into the New Jerusalem" (pg. 147).