Fasting has been a common practice in every age and among every nation. In A Commonsense Guide to Fasting, Rev. Kenneth E. Hagin gives long overdue insights from the Old and New Testaments into this subject. Rev. Hagin explains that "Fasting does not change God. Heis the same before, during, and after you fast. But fasting will change you. It will help you keep the flesh under. It will help you become more sensitive to the Spirit of God." In A Commonsese Guide to Fasting, Rev. Hagin encourages Christians to examine and follow the scriptural reasons for fasting.