The most unfortunate thing about the concept of mysticism is that the word itself has become mystified—and relegated to a “misty” and distant realm that implies it is only available to a very few. For me, the word simply means experiential knowledge of spiritual things, as opposed to book knowledge, secondhand knowledge, or even church knowledge. Most of organized religion, without meaning to, has actually discouraged us from taking the mystical path by telling us almost exclusively to trust outer authority, Scripture, tradition, or various kinds of experts (what I call the “containers”)—instead of telling us the value and importance...