ὁ μὴ πεπλευκὼς οὐδὲν ἑόρακεν κακόν → anyone who hasn't sailed has never seen trouble
P. διαφάνεια, ἡ.
clearness, perspicuity: P. and V. σαφήνεια, ἡ.
Met., simplicity (of character, etc.): P. ἁπλότης, ἡ.