With the fearful strain that is on me night and day, if I did not laugh I should die.

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.

To love someone deeply gives you strength. Being loved by someone deeply gives you courage.

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.