As to another customary inquiry of the scrupulous about the very minute creatures, not only such as mice and lizards, but also locusts, beetles, flies, fleas, and so forth, whether there were not in the ark a larger number of them than was determined by God in His command, those persons who are moved by this difficulty are to be reminded that the words "every creeping thing of the earth" only indicate that it was not needful to preserve in the ark the animals that can live in the water, whether the fishes that live submerged in it, or the sea-birds that swim on its surface. Then, when it is said "male and female," no doubt reference is made to the repairing of the races, and consequently there was no need for those creatures being in the ark which are born without the union of the sexes from inanimate things, or from their corruption; or if they were in the ark, they might be there as they commonly are in houses, not in any determinate numbers; or if it was necessary that there should be a definite number of all those animals that cannot naturally live in the water, that so the most sacred mystery which was being enacted might be bodied forth and perfectly figured in actual realities, still this was not the care of Noah or his sons, but of God. For Noah did not catch the animals and put them into the ark, but gave them entrance as they came seeking it. For this is the force of the words, "They shall come unto thee,"[1]--not, that is to say, by man's effort, but by God's will. But certainly we are not required to believe that those which have no sex also came; for it is expressly and definitely said, "They shall be male and female."[220] For there are some animals which are born out of corruption, but yet afterwards they themselves copulate and produce offspring, as flies; but others, which have no sex, like bees. Then, as to those animals which have sex, but without ability to propagate their kind, like mules and she-mules, it is probable that they were not in the ark, but that it was counted sufficient to preserve their parents, to wit, the horse and the ass; and this applies to all hybrids. Yet, if it was necessary for the completeness of the mystery, they were there; for even this species has "male and female."