A Digest of the Doctrine of St. Thomas on the Incarnation is a historical theological work that examines Thomas Aquinas's view of the Incarnation of Jesus Christ, particularly comparing it with the Scotist view (Duns Scotus), which holds that Jesus would still come in impassible flesh even if Adam had not sinned. It affirms Christ as the primary purpose of creation, not merely a response to sin, and contrasts this with the Thomistic view, which focuses more on the atonement as the primary reason for the Incarnation. The book presents the differences between these two theological traditions regarding the role and timing of the Incarnation, focusing on how the Scotists interpret scripture and the Church Fathers to support their view of Christ's primacy.