The source of all humor is not laughter, but sorrow.

Thanksgiving day. Let us all give humble, hearty, and sincere thanks now, but the turkeys.

The convention missionaries call "modesty" has no standard, and cannot have one, because it is opposed to nature and reason and is therefore an artificiality and subject to anybody's whim - anybody's diseased caprice.

Such is professional jealousy; a scientist will never show any kindness for a theory which he did not start himself.

There is probably no pleasure equal to the pleasure of climbing a dangerous Alp; but it is a pleasure which is confined strictly to people who can find pleasure in it.

Keep away from people who try to belittle your ambitions. Small people always do that but the really great make you feel that you too can become great. When you are seeking to bring big plans to fruition it is important with whom you regularly associate. Hang out with friends who are like-minded and who are also designing purpose-filled lives. Similarly be that kind of a friend for your friends.

Shut the door not that it lets in the cold but that it lets out the coziness.