Everything existing in the universe is the fruit of chance and necessity.
Now as of old the gods give men all good things, excepting only those that are baneful and injurious and useless. These, now as of old, are not gifts of the gods: men stumble into them themselves because of their own blindness and folly.
No power and no treasure can outweigh the extension of our knowledge.
I would rather discover one true cause than gain the kingdom of Persia.
It is greed to do all the talking but not to want to listen at all.
Throw moderation to the winds, and the greatest pleasures bring the greatest pains.