It is a great art to be superior to others without letting them know it.

If you would make yourself agreeable wherever you go, listen to the grievances of others but never relate your own.

I never had a man come to me for advice yet, but what I soon discovered that he thought more of his own opinion than he did of mine.

Consider the postage stamp: its usefulness consists in the ability to stick to one thing till it gets there.

Advice is like kissing: it costs nothing and is a pleasant thing to do.

You can reach stupidity only with a cannon ball.

Theory looks well on paper, but does not amount to anything without practice.