Never make a defense or an apology until you are accused.
Keep cool and you command everybody.
The fact that an opinion has been widely held is no evidence whatever that it is not utterly absurd; indeed in view of the silliness of the majority of mankind, a widespread belief is more likely to be foolish than sensible.
It is a good rule in life never to apologize. The right sort of people do not want apologies, and the wrong sort take a mean advantage of them.
The dead might as well try to speak to the living as the old to the young.
You have no control over what the other guy does. You only have control over what you do.
Never part without loving words to think of during your absence. It may be that you will not meet again in life.
Always do right. This will gratify some people and astonish the rest.
Our imagination is the only limit to what we can hope to have in the future.