This book is designed to make clear how to experience God during your life on earth. God is invisible and so cannot be found through any of the human senses at the will of a person. God is the one Who chooses to reveal Himself. When Jesus, God's son walked the earth He gave the keys of the kingdom of heaven to those who believed in Him. The apostle Peter was the first one to which He announced that He was giving the keys. The keys already existed, Jesus in HIs teaching was making understanding the keys clear so that anyone who followed Him would know how to use them and experience HIs kingdom while living their life on earth. Undamaged keys always open the lock they were designed to fit, the keys of the kingdom do the same to enable you to experience God during your life on earth.