
Augustine of Hippo
Catena Aurea · Matthäusevangelium 7
Give not that which is holy unto the dogs, neither cast ye your pearls before swine, lest they trample them under their feet, and turn again and rend you.
(ubi sup.) Because the simplicity to which He had been directing in the foregoing precepts might lead some wrongly to conclude that it was equally wrong to hide the truth as to utter what was false, He well adds, Give not that which is holy to the dogs, and cast not your pearls before swine.