Far from being a twentieth-century innovation, the idea of an eternal yet changeable God is part of our theological heritage.

This is a comprehensive study which examines mysticism from its pagan origins to Paul and the Church Fathers, as it was understood in medieval times, as well as by Jewish and Buddhist initiates. The book is a sweeping exegesis of historic and foundational literature and myth, which Bouyer interprets in the light of Christian history and theology.