I’ll start right off by saying this book is challenging. The topic of fasting is challenging to begin with, both to do and to understand. The writing is clear but there is a lot of repetition between chapters. The illustrations from actual events are compelling. They call to mind stories of the power of God from the second great awakening.
Hall discusses Biblical stories of fasting (e.g., Jesus, Paul, Moses), Biblical precepts about the practice, reasons why we should fast, the essentials of fasting and the human appetites to be mastered, very straightforward instructions on how to do it (drink lots of water, phases to expect, how to end one), the effects on the physical body (besides being hungry), and how to break the fast. On the practical side, he talks about the health benefits of fasting in terms of cleansing the body (digestive system, blood, etc.), conquering addiction to food or other things (smoking), and getting the body to readjust its metabolism to a healthier weight set-point. He also talks about healthy living post-fast, what foods to avoid (written in 1950, well before ultra-processed foods were the norm, and the bane of healthy diets).
He identifies four human appetites - spiritual, hunger, sex, and greed. In the normal human condition our lives are controlled by one of the last three. By overcoming hunger (which takes a few to several days) the other appetites are demoted in our soul. At the point our spiritual appetite can take control and urge us into Godly behavior. Hindrances and obstacles to a life of faith are removed, initially in small ways but eventually as an appetite altogether.
On the spiritual side, the first point is that after fasting forty days, Jesus told Satan that man shall not live by bread alone, but by every word that proceeds from the mouth of God. Then He started His ministry with preaching and miraculous works of power (healings, casting out demons, raising the dead). When we deny our bodily desires, we are open to focus on the essence of spiritual life - to hear God’s voice, to secure our faith in God’s presence, to know what God wants us to do and to pray for, and devote our whole heart to Him. In the quiet times that we need to set aside, any or all of these things empower us to become and to do in the spiritual realm. And this empowerment leads to the same kinds of ministry that history records both in the Bible and in more recent revivals. Yes, it seems that all revivals of which I have heard were intimately tied to intense fasting and prayer.
When I was forced to fast as a result of a medical procedure, the physical effects followed just as the book describes. More importantly, when I set aside quiet time to wait on the Lord, I was able to grasp just how helpless I am apart from the Lord. And the physical pain that could only be partially medicated and resulting hours of being awake in bed were perhaps a foretaste of what eternity will be like for those we cannot reach, who will regret their actions in this life that they cannot undo in the next, their separation from God, and their inability to do anything at all. I did not sense any new spiritual depth to pray for lost sinners or nations at war (both of which desperately need prayer), but this was not primarily a spiritual fast.
And so the book concludes that a great spiritual awakening is in the making, a mighty revival of power, signs, wonders and miracles. The Holy Spirit is on the move and we must respond with fasting and prayer. This was written in 1950, before the Charismatic revival (portrayed in the movie The Jesus Revolution), or the Catholic charismatic conferences. But in the 21st century, we face unprecedented spiritual challenges discussed in The Return of the Gods (and innumerable other books and media). We need to buckle down and learn from prior generations how to experience God’s power and presence through fasting and prayer.