21Or apophthegms, of which Plutarch and Lord Verulam have both left us collections.22Thucydides, ii. 40. Pericles is the speaker.23"Zenonis discipulus."—Reiske.24"Works and Days," 371.25Cf. Shakspere, "Hamlet," i. iii. 76.26Our "Set a thief to catch a thief."