Lactantius

“ But they did not even themselves retain the name of philosophers, since they admitted their ignorance, because to be ignorant of all things is not only not the part of a philosopher, but not even of a man. Thus the philosophers, because they have no defence, must destroy one another with mutual wounds, and philosophy itself must altogether consume and put an end to itself by its own arms. ”

“ For when the leading men of that sect saw that philosophy was altogether overthrown by philosophers mutually opposing each other, they undertook war against all, that they might destroy all the arguments of all; while they themselves assert nothing except one thing—that nothing can be known. ”