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

I am an optimist. It does not seem too much use being anything else.

The revelation of thought takes men out of servitude into freedom.

A consumer doesn't take anything away: he doesn't actually consume anything. Giving the same thing to a thousand consumers is not really any more expensive than giving it to just one.

Out of 6 billion humans, the troublemakers are just a handful.