When the well is dry, people know the worth of water. [so appreciate what you have while you have it]

To inquisitive minds like yours and mine the reflection that the quantity of human knowledge bears no proportion to the quantity of human ignorance must be in one view rather pleasing, viz., that though we are to live forever we may be continually amused and delighted with learning something new.

Liberality is not giving much, but giving wisely.

There are three things extremely hard: steel, a diamond, and to know one's self.

Fart for freedom, fart for liberty—and fart proudly.

Great good nature without prudence is a great misfortune.

Look before, or you'll find yourself behind.