This volume represents the first book-length treatment in English of one of the greatest mystical writers in Christian history, Jan van Ruusbroec (1293-1381). A careful reading of the texts by the Flemish historian Paul Mommaers focuses on two delicate relationships: that between mysticism and religiosity and that between a mysticism of union in love and the more metaphysical mysticism of unity.

Winding in and out of this presentation is a commentary by theologian of religions Jan Van Bragt, which attempts to place the problematic in a wider, interreligious context by contrasting the spiritual path of Buddhism with that of the Christian mystical way.

The combined result is not only an original reading of the great Flemish love-mystic, but a groundbreaking attempt to view religious history through the dual lenses of one's own faith and that of the faith of others. Ruusbroec's approach is seen to challenge traditional ideas about differences between the Buddhist and Christian ways and to open new possibilities for further encounters at the level of mystical thought and practice.