If a man be gloomy let him keep to himself. No one has the right to go croaking about society, or what is worse, looking as if he stifled grief.

Never complain and never explain.

Man is more powerful than matter.

What is earnest is not always true; on the contrary error is often more earnest than truth.

War is never a solution; it is an aggravation.

I do not like giving advice: it is incurring an unnecessary responsibility.

He was distinguished for ignorance; for he had only one idea, and that was wrong.