A Grammar of Holy Mystery is about Christian spirituality. It is about mysticism as a firsthand encounter with the presence of God—unfathomable, unnamable, mysterious, fulfilling. It is about classical Christianity, the way of transforming truth found in Christ, taught in Scripture, lived by saints, sages, and mystics, and passed on as a sacred trust through the centuries. Being neither liberal nor conservative, but simply Christian, it is ecumenical in spirit. For those traumatized by harsh or shallow churches, A Grammar of Holy Mystery points the way out and shows the way to a faith that renews the mind, restores the spirit, and gladdens the heart.

Vietnamese American Peter Phan reflects on cultural diversity in spiritual life, focussing on the question of how much uniformity people will tolerate in life, liturgy, & denominational self-definition.