Everything flows and nothing abides. Everything gives way and nothing stays fixed.

Even what those with the greatest reputation for knowing it all claim to understand and defend are but opinions.

To do the same thing over and over again is not only boredom: it is to be controlled by rather than to control what you do.

We have to be faster in calming down a resentment than putting out a fire, because the consequences of the first are infinitely more dangerous than the results of the last; fire ends burning down some houses at the most, while the resentment can cause cruel wars, with the ruin and total destruction of nations.

It is difficult to fight against anger; for a man will buy revenge with his soul.

Knowledge is not intelligence.

Men who wish to know about the world must learn about it in its particular details.