Based on the fact that the Bible is the infallible word of God. this book reviews the fundamentals of the Christian faith, showing not only what we believe, but why we believe it. That is, demonstrating where and how the Holy Spirit, who inspired all of the Bible, taught each of these truths. For "All Scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness, that the man of God may be complete, thoroughly equipped for every good work." (2 Timothy 3:16-17)