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Quotes about Morality

Be good and you will be lonely.
— Mark Twain
You can't pray a lie.
— Mark Twain
I have a higher and grander standard of principle than George Washington. He could not lie; I can, but I won't.
— Mark Twain
Adam was but human—this explains it all. He did not want the apple for the apple's sake, he wanted it only because it was forbidden.
— Mark Twain
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.
— Mark Twain
Each man must for himself alone decide what is right and what is wrong, which course is patriotic and which isn't. You cannot shirk this and be a man. To decide against your conviction is to be an unqualified and excusable traitor, both to yourself and to your country, let me label you as they may.
— Mark Twain
The fact that man knows right from wrong proves his intellectual superiority to other creatures but the fact that he can do wrong proves his moral inferiority to any creature that cannot.
— Mark Twain
The proper office of a friend is to side with you when you are wrong. Nearly anybody will side with you when you are right.
— Mark Twain
To be good is noble, but to teach others how to be good is nobler--and less trouble.
— Mark Twain
Good friends, good books, and a sleepy conscience: this is the ideal life.
— Mark Twain
The future of this nation depends on the Christian training of our youth.
— George Washington
A nation that kills its own children has no future.
— Pope John Paul II