In Two Worlds Are Ours, An Introduction to Christian Mysticism, John Macquarrie examines the lives and writings of a range of Christian mystics, both men and women, over a vast period of time (from Biblical times to present day). He presents their teachings, mostly in their own words, and shows how their ideas and the strength of their beliefs has brought great benefit to the Church over the course of history, and how they can continue to do so today