Augustine, Confessions §aug_conf_13_034: But what is this, and what kind of mystery?

But what is this, and what kind of mystery? Behold, Thou blessest mankind, O Lord, that they may increase and multiply, and replenish the earth; dost Thou not thereby give us a hint to understand something? why didst Thou not as well bless the light, which Thou calledst day; nor the firmament of heaven, nor the lights, nor the stars, nor the earth, nor the sea? I might say that Thou, O God, who created us after Thine Image, I might say, that it had been Thy good pleasure to bestow this blessing peculiarly upon man; hadst Thou not in like manner blessed the fishes and the whales, that they should increase and multiply, and replenish the waters of the sea, and that the fowls should be multiplied upon the earth. I might say likewise, that this blessing pertained properly unto such creatures, as are bred of their own kind, had I found it given to the fruit-trees, and plants, and beasts of the earth. But now neither unto the herbs, nor the trees, nor the beasts, nor serpents is it said, Increase and multiply; notwithstanding all these as well as the fishes, fowls, or men, do by generation increase and continue their kind.