γέλως τὰ σεμνὰ τοῦ βίου τοῖς σώφροσιν → pompous things in life make men of sound mind laugh (Menander)
subs.
Shrewdness: P. and V. σύνεσις, ἡ, P. δεινότης, ἡ, ὀξύτης, ἡ.