Those who know nothing of foreign languages, knows nothing of their own.

Because everyone uses language to talk, everyone thinks he can talk about language

The limits of my language are the limits of my universe.

Mathematicians are like Frenchmen: whatever you say to them they translate into their own language and forthwith it is something entirely different

The formation of one's character ought to be everyone's chief aim.

It is in human nature to relax, when not compelled by personal advantage or disadvantage.