[12] But they ought, if they had really been at all anxious for the truth, not to show themselves, in respect of their minds, inferior to those who have been diseased in their bodies; for such invalids, out of their desire for good health, commit themselves to the physicians. But these other men hesitate to get rid of that disease of the soul, ignorance, by becoming the associates of wise men; from whom they might not only learn to escape ignorance, but they might also acquire that peculiar possession of man, namely, knowledge.