In this masterful historical survey, theologian John Macquarrie demonstrates how Christians, especially the great mystics, have experienced at their own radiant core the love and presence of God. The word mysticism evokes ecstatic visions, asceticism, and esoteric teaching. Yet, the author maintains, mystics are better thought of as people who exhibit common human curiosity, long to explore religious mystery, and ultimately find a deep personal relationship with God. Macquarrie discusses in detail the ten common traits of mysticism before tracing two millennia of Christian mysticism. He mainly allows the mystics to speak for themselves, but he is also particularly insightful about the greatest individuals of the tradition--from Paul to the patristic Platonists to the classic medieval mystics to a host of twentieth-century exemplars.