I've read that Philip II of Macedon said that if he had listened to Demosthenes, he would have declared war on himself. Ref. (it's an old book, and in Spanish): Historia de la literatura griega, 2, ...
The following is from Heinlein's Starship Troopers (1959): Youse guys think this deleted outfit is a blankety-blank nursery. Well, it ain't! See? —Remark attributed to a Hellenic corporal ...