I am not interested to know whether vivisection produces results that are profitable to the human race or doesn't...The pain which it inflicts upon unconsenting animals is the basis of my enmity toward it, and it is to me sufficient justification of the enmity without looking further.

If you invent two or three people and turn them loose in your manuscript, something is bound to happen to them -- you can't help it; and then it will take you the rest of the book to get them out of the natural consequences of that occurrence, and so first thing you know, there's your book all finished up and never cost you an idea.

The Koran does not permit Mohammedans to drink. Their natural instincts do not permit them to be moral. They say the Sultan has eight hundred wives. This almost amounts to bigamy.

Love is madness, if thwarted it develops fast.

No real gentleman will tell the naked truth in the presence of ladies.

I thoroughly disapprove of duels. If a man should challenge me, I would take him kindly and forgivingly by the hand and lead him to a quiet place and kill him.

Don't live in the past, don't ponder about the future, stay at the PRESENT moment NOW...always.