THIRD ARTICLE: WHETHER IT IS PROPER TO THE RATIONAL NATURE TO BE ADOPTED

Reply. Every intellectual creature, and only such, can be adopted. for only such a creature is capable of grace on which adoption rests, and of happiness in which inheritance consists.

Therefore the angels are adoptive sons of God; likewise our first parents in the state of innocence; the just of the Old Testament; also all who are in the state of grace, as long as they remain so, even though they are not predestined.

Objection. St. Paul introduces a state of opposition between the Christians and the just of the Old Testament,[1602] inasmuch as the latter received the spirit of bondage in fear, whereas the Christians received the spirit of the adoption of sons.

Reply. St. Paul does not introduce opposition between them because of personal justice, but by reason of the difference of state and law in which each class lived; for the Old Law was the law of fear in itself, and of itself it did not have the power to justify; whereas the New Law is the law of grace previously imprinted on the hearts and having the power to justify.[1603] Thus it is sufficient for salvation, although not all the just are actually saved, for some fall away from grace.