Wisest is he who knows he knows not.

I only know that I know nothing

Our lives are but specks of dust falling through the fingers of time. Like sands of the hourglass, so are the days of our lives.

In every one of us there are two ruling and directing principles, whose guidance we follow wherever they may lead; the one being an innate desire of pleasure; the other, an acquired judgment which aspires after excellence.

Let us follow the truth whither so ever it leads.

It is possible that a man could live twice as long if he didn't spend the first half of his life acquiring habits that shortens the other half

Every pleasure or pain has a sort of rivet with which it fastens the soul to the body and pins it down and makes it corporeal, accepting as true whatever the body certifies.