Epictetus. (c.A.D. 50c.A.D. 138). The Golden Sayings of Epictetus.
The Harvard Classics. 190914.
I think I know now what I never knew beforethe meaning of the common saying, A fool you can neither bend nor break. Pray heaven I may never have a wise fool for my friend! There is nothing more intractable.My resolve is fixed!Why, so madmen say too; but the more firmly they believe in their delusions, the more they stand in need of treatment.