53 Now that you may understand the saying of the Lord, when He said, All things whatsoever the Father has are Mine, learn the teaching and faith of the Apostle who said, Take heed lest any lead you astray through philosophy and vain deceit, after the tradition of men, after the elements of the world and not after Christ; for in Him dwells the fullness of Godhead bodily. That man is of the world and savours of the teaching of men and is the victim of philosophy, who does not know Christ to be the true God, who does not recognise in Him the fullness of Godhead.
The mind of man knows only that which it understands, and the world's powers of belief are limited, since it judges according to the laws of the material elements that that alone is possible which it can see or do. For the elements of the world have come into being out of nothing, but Christ's continuity of existence did not begin in the non-existent, nor did He ever begin to exist, but He took from the beginning a beginning which is eternal. The elements of the world are either without life, or have issued out of this stage into life, but Christ is life, born to be living God from the living God.
The elements of the world have been established by God, but they are not God: Christ as God of God is Himself wholly all that God is. The elements of the world, since they are within it, cannot possibly rise out of their condition and cease to be within it, but Christ, while having God within Himself through the Mystery, is Himself in God. The elements of the universe, generating from themselves creatures with a life like their own, do indeed through the exercise of their bodily functions bestow upon them from their own bodies the beginnings of life, but they are not themselves present as living beings in their offspring, whereas in Christ all the fullness of the Godhead is present in bodily shape.
Source: On the Trinity (New Advent)