Life unexamined, is not worth living.
One great difference between a wise man and a fool is, the former only wishes for what he may possibly obtain; the latter desires impossibilities.
No power and no treasure can outweigh the extension of our knowledge.
The pride of youth is in strength and beauty, the pride of old age is in discretion.
It is greed to do all the talking but not to want to listen at all.
Magnanimity consists in enduring tactlessness with mildness.