To understand the meaning of the Mystery of the Redemption better we must realize that all our Lord’s works, especially this which is the greatest of all, are ordained with supreme wisdom and care, the principal rule being that the works of nature and grace are regulated in the same manner. Both being our Lord’s actions, and sisters and daughters of the same Father, who is God, it is right that they should resemble one another. This philosophy is followed by the Holy Doctor in all his writings. Therefore we must’ imagine two worlds in this world: the natural one which we see with all that it contains, and the supernatural world which is the Catholic Church, with its mysteries and Sacraments. Let us first examine how our Lord formed the natural world, that we may understand the creation of the supernatural one.

Boetius explains this briefly :

signifying that this most beautiful Lord, the Source of all beauty, traced within His divine intelligence the perfect image of this world, and using it as His model, created it and made it visible. And since in this world, besides Himself, there was to be a chief and ruler upon whom all things depended, He created the first and highest heaven, which is called the first propellor, and placed in it a glorious angel who with incredible swiftness revolved the world completely in the course of each day. This foundation being thus moved causes all the movements, alterations and productions on the earth.