Riddles of the Soul is the first complete English edition of one of the major books by Rudolf Steiner, Von Seelenrätseln . Dr. Steiner said of the first essay that it is written not with a pen, but with "soul-spades that want to rip away the planks that board up the world, i.e., that want to clear away the limits to knowledge set by natural science, but want to do so with inner work of the soul." In the second essay Steiner does battle with Max Dessoir, a typical foe of the spirit. He describes for the first time how the three soul-forces (thinking, feeling, and willing) relate to the three systems of the body (nerve-sense, rhythmic, and metabolic-limb). This unique work is an exploration of inner and outer frontiers and how bridges between them are built.