Not until he acquires European manners does the American anarchist become the gentleman who assures you that people cannot be mademoral by Act of Parliament (the truth being that it is only by Acts of Parliament that men in large communities can be made moral, even when they want to).

An Englishman does everything on principle: he fights you on patriotic principles; he robs you on business principles; he enslaves you on imperial principles.

If history repeats itself, and the unexpected always happens, how incapable must Man be of learning from experience.

No man fully capable of his own language ever masters another.

The confusing of marriage with morality has done more to destroy the conscience of the human race than any other single error.

A thing that nobody believes cannot be proved too often.

If you leave the smallest corner of your head vacant for a moment, other people's opinions will rush in from all quarters.