Matthias Joseph Scheeben here delineates who and what Jesus Christ is as the Incarnate Son of God in Person. With characteristic brilliance, Scheeben sets forth in this first half-volume the essential nature and attributes proper to Christ as the hypostatic union of God and man.

Beginning with the Scriptural and traditional foundations, he elucidates the Catholic Church's traditional teaching on Christ's unity of Person in two natures as they were developed in response to the main Christological heresies of the early Christian centuries. On this basis, he then delves into the speculative depths of the hypostatic union itself as well as the attributes of the God-man that arise from this union.