Everything you need to understand or teach Mere Christianity by C. S. Lewis.
C. S. Lewis defends Christianity by building a logical foundation for belief and constructing an entire theology upon that foundation. He begins with the premise that a Natural Law must exist, as humans did not invent it, but humans respond to it and cannot escape its influences. From this he proposes that God must exist, and that this God must be made up of three parts: the Father, the Son and...