Verse 20. Let the waters bring forth... the moving creature . ⁴⁰ On the fifth day the birds and fishes are created. The blessing of God is added, that they may of themselves produce offspring. Here is a different kind of propagation from that in herbs and trees: for there the power of fructifying is in the plants, and that of germinating is in the seed; but here generation takes place. It seems, however, but little consonant with reason, that he declares birds to have proceeded from the waters; and, therefore this is seized upon by captious men as an occasion of calumny. But although there should appear no other reason but that it so pleased God, would it not be becoming in us to acquiesce in his judgment? Why should it not be lawful for him, who created the world out of nothing, to bring forth the birds out of water? And what greater absurdity, I pray, has the origin of birds from the water, than that of the light from darkness? Therefore, let those who so arrogantly assail their Creator, look for the Judge who shall reduce them to nothing. Nevertheless if we must use physical reasoning in the contest, we know that the water has greater affinity with the air than the earth has. But Moses ought rather to be listened to as our teacher, who would transport us with admiration of God through the consideration of his works. ⁴¹ And, truly, the Lord, although he is the Author of nature, yet by no means has followed nature as his guide in the creation of the world, but has rather chosen to put forth such demonstrations of his power as should constrain us to wonder.

Verse 21. And God created . A question here arises out of the word created. For we have before contended, that because the world was created, it was made out of nothing; but now Moses says that things formed from other matter were created. They who truly and properly assert that the fishes were created because the waters were in no way sufficient or suitable for their production, only resort to a subterfuge: for, in the meantime, the fact would remain that the material of which they were made existed before; which, in strict propriety, the word created does not admit. I therefore do not restrict the creation here spoken of to the work of the fifth day, but rather suppose it to refer to that shapeless and confused mass, which was as the fountain of the whole world. ⁴² God then, it is said, created whales (balaenas) and other fishes, not that the beginning of their creation is to be reckoned from the moment in which they receive their form; but because they are comprehended in the universal matter which was made out of nothing. So that, with respect to species, form only was then added to them; but creation is nevertheless a term truly used respecting both the whole and the parts. The word commonly rendered whales (cetos vel cete) might in my judgment be not improperly translated thynnus or tunny fish, as corresponding with the Hebrew word thaninim. ⁴³

When he says that "the waters brought forth," ⁴⁴ he proceeds to commend the efficacy of the word, which the waters hear so promptly, that, though lifeless in themselves, they suddenly teem with a living offspring, yet the language of Moses expresses more; namely, that fishes innumerable are daily produced from the waters, because that word of God, by which he once commanded it, is continually in force.

Verse 22. And God blessed them . What is the force of this benediction he soon declares. For God does not, after the manner of men, pray that we may be blessed; but, by the bare intimation of his purpose, effects what men seek by earnest entreaty. He therefore blesses his creatures when he commands them to increase and grow; that is, he infuses into them fecundity by his word. But it seems futile for God to address fishes and reptiles. I answer, this mode of speaking was no other than that which might be easily understood. For the experiment itself teaches, that the force of the word which was addressed to the fishes was not transient, but rather, being infused into their nature, has taken root, and constantly bears fruit.