Bonaventure, on Gen 1:28

“And God blessed them, saying: Increase and multiply, and fill the earth, and subdue it, and rule over the fishes of the sea, and the fowls of the air, and all living creatures that move upon the earth.”

“A twofold precept was given to man, namely of nature and of discipline; the precept of nature: "Increase and multiply"; the precept of discipline: "Of the tree of knowledge of good and evil thou shalt not eat." A twofold good was prepared for man: one visible, the other invisible; one temporal, the other eternal; one for the flesh, the other for the spirit. Of these goods, God gave one and promised the other, so that one might be possessed freely, and the other sought through merit. And because a good is given in vain unless it is preserved, and is promised in vain unless one attains to it, therefore a twofold precept was given to man: one of nature for preserving the good given, the other of discipline for meriting the good promised.”

Imported from an open dataset — not yet checked against the printed edition.