The times we live in are scary and unpredictable. The world is unstable and global politics and finance are volatile. None of us are certain about what might happen tomorrow and most people feel helpless to do anything about it. Yet what we are facing is nothing new. History is punctuated with numerous similar periods. What did the people of God do during such times? They prayed and fasted. Derek Prince asserts that you can make a difference in an unpredictable world. Your prayers can actually change it. Using illustrations from his own life the author shows how you can use your influence in heaven, touching the heart of God in prayer, to make a difference. He gives us practical guidelines and imparts tried and tested biblical principles.