I know that I am intelligent, because I know that I know nothing.

It is a mania shared by philosophers of all ages to deny what exists and to explain what does not exist.

Those who educate children well are more to be honored than they who produce them; for these only gave them life, those the art of living well.

I don't know if you ever really feel like you've made it.

We shall see but a little way if we require to understand what we see.