Man is most nearly himself when he achieves the seriousness of a child at play.
One must talk about everything according to its nature, how it comes to be and how it grows. Men have talked about the world without paying attention to the world of their own minds, as if they were asleep or absent-minded.
There is nothing permanent except change.
It is hard to fight against impulsive desire: whatever it wants, it will buy at the cost of the soul.
The nature of things is in the habit of concealing itself.
It is better to hide ignorance, but it is hard to do this when we relax over wine.
The way up and the way down are one and the same.
Doctors cut, burn, and torture the sick, and then demand of them an undeserved fee for such services.
The fairest harmony springs from discord.
Man is not made for defeat.