Bede : In which were all kinds of four-footed creatures and reptiles of the earth, and birds of the air. Those animals are all the nations impure by errors, but cleansed by the thrice immersion, that is, by the mystery of the Holy Trinity in baptism, which, leaving the image of man, took on the forms of beasts and serpents. Thus it is said to Herod because of his deceitful wickedness: Go tell that fox (Luke 13). And to the Pharisees: Brood of vipers (Luke 3). And to the lustful: Horses maddened in pursuit of mares (Jer. 5). And of the shameless: Do not give what is holy to the dogs (Matt. 7). And of the voluptuous: Do not throw your pearls before swine (ibid.). And of the proud and deceitful: The foxes have holes, and the birds of the air have nests (Matt. 8). And generally of all: And man being in honor, that is, made in the image of God, did not understand, was compared to senseless animals (Ps. 49). But Solomon shows the true man, that is, incorrupt: Fear God and keep His commandments, for this is the whole duty of man (Eccl. 12). — Commentary on Acts