I answer that, As Augustine says (Gen. ad lit. viii, 10), these words in Genesis may be understood in two ways. First, in the sense that God placed man in paradise that He might Himself work in man and keep him, by sanctifying him (for if this work cease, man at once relapses into darkness, as the air grows dark when the light ceases to shine); and by keeping man from all corruption and evil. Secondly, that man might dress and keep paradise, which dressing would not have involved labor, as it did after sin; but would have been pleasant on account of man's practical knowledge of the powers of nature. Nor would man have kept paradise against a trespasser; but he would have striven to keep paradise for himself lest he should lose it by sin. All of which was for man's good; wherefore paradise was ordered to man's benefit, and not conversely.
Whence the Replies to the Objections are made clear. _______________________
FOURTH ARTICLE [I, Q. 102, Art. 4]
Whether Man Was Created in Paradise?
Objection 1: It would seem that man was created in paradise. For the angel was created in his dwelling-place—namely, the empyrean heaven. But before sin paradise was a fitting abode for man. Therefore it seems that man was created in paradise.
Obj. 2: Further, other animals remain in the place where they are produced, as the fish in the water, and walking animals on the earth from which they were made. Now man would have remained in paradise after he was created (Q. 97, A. 4). Therefore he was created in paradise.
Obj. 3: Further, woman was made in paradise. But man is greater than woman. Therefore much more should man have been made in paradise.
On the contrary, It is written (Gen. 2:15): "God took man and placed him in paradise."
I answer that, Paradise was a fitting abode for man as regards the incorruptibility of the primitive state. Now this incorruptibility was man's, not by nature, but by a supernatural gift of God. Therefore that this might be attributed to God, and not to human nature, God made man outside of paradise, and afterwards placed him there to live there during the whole of his animal life; and, having attained to the spiritual life, to be transferred thence to heaven.
Reply Obj. 1: The empyrean heaven was a fitting abode for the angels as regards their nature, and therefore they were created there.