
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.) That which follows, Turn again and rend you, He means not the pearls themselves, for these they tread under foot, and when they turn again that they may hear something further, then they rend him by whom the pearls on which they had trode had been cast. For you will not easily find what will please him who has despised things got by great toil. Whoever then undertake to teach such, I see not how they shall not be trode upon and rent by those they teach.