Since the time of bloody persecutions right up to the post-modern age, each historical period posed its particular challenge to Christianity. Psychologically, Christians' vitality in overcoming these challenges came primarily from what is perhaps the deepest mystery of faith itself-the believers' union with God. The postmodern positivist questions this mystery, and rejects the possibility of communication with a non-sensorial and therefore "non-existing" God. Agnostics proclaim, "One man's religion, is another's delusion." Therefore, the modern challenge for Christians is to explain how God, despite being invisible, is experientially present in the life of believers. Although the experience of living in a relationship with an invisible God is a profound one for Christians, it seems nonsensical to those who emphasize the primacy of sensory experience. Paul Ungar's extensive scholarly training equips him remarkably well to explore where, when, how, and through which psychological functions communication with the spiritual God factually occur. Ungar's The Mystery of Christian Faith: A Tangible Union with the Invisible God is an apologetic work on the borderline of theology, psychology and philosophy. It is written for Christian intellectuals regardless of their denominational background and rationally demonstrates what Francois Mauriac's hauntingly poetic expression, "Nothing is more alien than living in a Godless world, and nothing is closer to humans than God."

Contemporary news headlines, as well as the history of the Church, are replete with scandals, unholy acts, and abuses of power. Such a disappointing trend has shaken the faith of many, and made it fashionable to decry the hypocrisy of "organized religion." Yet despite these massive stumbling blocks, the Church has always insisted, and continues to maintain, that it is none other than the Holy Body of Christ. How can these polarities be reconciled? How can the world's trust in the Church be renewed in this postmodern era of religious indifference and apathy? How can an obviously flawed institution become the genuine Church, as intended by Jesus Christ? Responding to these questions, the author calls for a critical self-evaluation of the Church in her quest for renewal, presents a much-needed modern interdisciplinary approach to apologetics, and powerfully promotes ecumenism. This scholarly and passionately written book substantiates Christian optimism, and provides a thoughtful and convincing response to the challenges posed by skeptics such as Nietzsche, Freud, Dawkins, and their contemporary intellectual heirs.