Many Bible concepts are difficult to understand. This book explains subjects such as salvation by faith in Christ, the Trinity, what eternity will be like, why Jesus taught the way He taught, the soul vs human spirit, prayer, Old Testament relevance, the Tribulation, the Millennium, and many other deep Bible concepts. It also explains what the Bible calls the "mystery" which was hidden until the Church Age. The more we understand about the deep concepts of the Bible, the more we know God Himself and Jesus Christ our Savior.