This profound and insightful book includes selected writings of Christian sages and saints from the Orthodox, Roman Catholic, Evangelical and Celtic branches of the Christian tradition. They are presented from a perspective of 'the transcendent unity of denominations. Selections include contributions from great Christian writers including: St. Ignatius of Antioch, St Augustine of Hippo, St. Maximos the Confessor, St. Anselm, St. Bernard of Clairvaux, St. Thomas Aquinas, Meister Eckhart, St. Gregory Palamas, St. Seraphim of Sarov, Samuel Taylor Coleridge, C.S Lewis, Nikolai Velmimirovich and more. Not Of This World offers proof that genuine spirituality is a common and fundamental aspect of genuine Christianity. The book is complemented by an introduction, which is itself worthy of being included within the textual content of the book and an excellent biography that provides the reader with deeper wells to fathom.