Public education has not produced an educated public.

The thing I hate about an argument is that it always interrupts a discussion.

We shall soon be in a world in which a man may be howled down for saying that two and two make four, in which people will persecute the heresy of calling a triangle a three-sided figure, and hang a man for maddening a mob with the news that grass is green.

I owe my success to having listened respectfully to the very best advice, and then going away and doing the exact opposite.

Love means to love that which is unloveable. Otherwise it is no virtue at all.

I would maintain that thanks are the highest form of thought; and that gratitude is happiness doubled by wonder.

The reason angels can fly is because they take themselves lightly.

There are only two kinds of people, those who accept dogmas and know it, and those who accept dogmas and don't know it.

You find out the necessity of Liberty as you find out the necessity of air—by not having enough of it.

Without education we are in a horrible and deadly danger of taking educated people seriously.