EIGHTH ARTICLE: WHETHER UNION IS THE SAME AS ASSUMPTION

First conclusion. There is a distinction between union as implying a relation, and assumption that implies an action; for this relation is in Christ's humanity and follows the active assumption, which is the foundation for this relation, just as passive generation is the foundation of the relation of filiation.

Second conclusion. Hence assumption implies becoming, whereas union implies having become. Thus we say of what took place, that the Word assumed the human nature, and even now that it is united with the Word.

Third conclusion. Whereas union implies a relation of quasi-equivalence, and both the divine nature and the human nature are declared united; but assumption, which is the action of the one assuming, does not designate the divine nature, but the agent assuming and the human nature that is assumed.

Fourth conclusion. Who unites and who assumes are not the same absolutely, for only the Son of God assumed the human nature, but the Father and the Holy Spirit are said to unite, but not to assume. For union as an action implies only the conjunction of extremes, whereas assumption as an action means the same as the taking to oneself, inasmuch as He who assumes unites to Himself personally, and is the end of the terminating action and not merely its beginning. Every external action of God is common to the three persons, just as omnipotence is, from which action derives its power; but one person, such as the person of the Word, can be separately the terminus of some real relation.[613]