The man who insists he as good as anybody, believes he is better.

Man is still a savage to the extent that he has little respect for anything that cannot hurt him.

It is your enemies who keep you straight. For real use one active, sneering enemy is worth two ordinary friends.

A theory is no more like a fact than a photograph is like a person.

I declare my belief that it is not your duty to do anything that is not to your own interest. Whenever it is unquestionably your duty to do a thing, then it will benefit you to perform that duty.

Common sense is compelled to make its way without the enthusiasm of anyone.

A man will do more for his stubbornness than for his religion or his country