Que sçais-je?" (What do I know?)

One should always have one's boots on and be ready to leave.

A little of everything and nothing thoroughly, after the French fashion.

I love a friendship that flatters itself in the sharpness and vigor of its communications.

'Tis the sharpness of our mind that gives the edge to our pains and pleasures.

To smell, though well, is to stink.

We must not attach knowledge to the mind, we have to incorporate it there.