This book explores the relationship between psychoanalysis and Catholicism. It argues that they are compatible, but that scientism -- the view that empirical science constitutes the most authoritative worldview or the most valuable part of human learning -- obscures this view from the public. The author addresses Freudian concepts of libido, psychosexual development and sublimation in the light of Catholic teaching, and critiques the de-humanizing tendencies prevalent in the mental-health field.