It is sometimes said, common sense is very rare.
On dit quelquefois, le sens commun est fort rare...
Original text (French)
Notes from Wikiquote
Philosophical Dictionary "Sens Commun", Dictionnaire philosophique (ed. 1767) | Original Latin: rarus enim ferme sensus communis in illa fortuna. | Published translation in French (1731): Il est fort rare qu'on conserve le Sens commun dans une si haute fortune | English translation: For rarely are civic sympathies [or: common sense] to be found in that rank.