Morality is a private and costly luxury
Adams, Henry Brooks

The hottest places in hell are reserved for those who, in a period of moral crisis, maintain their neutrality
Alighieri, Dante (Durante)

The only immorality is not to do what one has to do when one has to do it
Anouilh, Jean

When men are inhuman, take care not to feel towards them as they do towards other humans.
Antoninus, Marcus Aelius Aurelius

If it is not right do not do it; if it is not true do not say it.
Antoninus, Marcus Aelius Aurelius

It is not always the same thing to be a good man and a good citizen
Aristotle

Never let your sense of morals get in the way of doing what's right
Asimov, Isaac

The crucial point is precisely there: in this total counter-meaning to Good and Evil in Western philosophy, the philosophy of Enlightenment. We naively believe that the progress of the Good, its rise in all domains (sciences, techniques, democracy, human rights) correspond to a defeat of Evil. Nobody seems to understand that Good and Evil rise simultaneously, and in the same movement. The triumph of the One does not produce the erasure of the Other.
Baudrillard, Jean

There are different ways of assassinating a man - by pistol, sword, poison, or moral assassination. They are the same in their results except the last is more cruel.
Bonaparte, Napoleon

Men have no right to put the well-being of the present generation wholly out of the question. Perhaps the only moral trust with any certainty in our hands is the care of our own time.
Burke, Edmund

The only thing necessary for the triumph of Evil is for good men to do nothing.
Burke, Edmund

Though sages may pour out their wisdom's treasure, there is no sterner moralist than pleasure
Byron, Lord George Gordon Noel

Everything's got a moral, if only you can find it
Carroll, Lewis

An evil at its birth, is easily crushed, but it grows and strengthens by endurance.
Cicero, Marcus Tullius

Without ethics, everything happens as if we were all five billion passengers on a big machinery and nobody is driving the machinery. And it's going faster and faster, but we don't know where.
Cousteau, Jacques-Yves

He who does not punish evil commands it to be done.
Da Vinci, Leonardo

Common experience shows how much rarer is moral courage than physical bravery. A thousand men will march to the mouth of the cannon where one man will dare espouse an unpopular cause.
Darrow, Clarence Seward

A man's ethical behavior should be based effectually on sympathy, education, and social ties; no religious basis is necessary. Man would indeed be in a poor way if he had to be restrained by fear of punishment and hope of reward after death.
Einstein, Albert

Christ died for our sins. Dare we make his martyrdom meaningless by not committing them?
Feiffer, Jules

It is almost systematically to constitute a natural moral law. Nature has no principles. She furnishes us with no reason to believe that human life is to be respected. Nature, in her indifference, makes no difference between right and wrong
France, Anatole

Men are more moral than they think and far more immoral than they can imagine
Freud, Sigmund

He that falls into sin is a man; that grieves at it may be a saint; that boasteth of it is a devil.
Fuller, Dr. Thomas

Venture not to the utmost bounds of even lawful pleasure; the limits of good and evil join.
Fuller, Dr. Thomas

If moral behavior were simply following rules, we could program a computer to be moral.
Ginder, Samuel P

Want of prudence is too frequently the want of virtue; nor is there on earth a more powerful advocate for vice than poverty?
Goldsmith, Oliver