This, then, is the bottom-line truth that must be central in everything we discuss: Christianity is true, so anything opposing it is false. This means that whatever opposition to Christianity we face, it is by definition an opposition that is false. Even if we have no idea what the central tenets or teachings are in such opposition, we know at the outset that it cannot sustain itself in God’s world. The rest of this book is an attempt to explain the implications of that central truth.