Whitehead's thought continues to attract attention in mathematics and metaphysics, but few have recognized with Roland Faber, the deeply mystical dimensions of his philosophy. "If you like to phrase it so," Whitehead states, "philosophy is mystical. For mysticism is direct insight into depths as yet unspoken." Where, however, do these unspoken depths speak in Whitehead, and what are their associated themes in his philosophy? For the first time, Depths...