In stating the principles which regulate exchangeable value and price, we should carefully distinguish between those variations which belong to the commodity itself, and those which are occasioned by a variation in the medium in which value is estimated, or price expressed.
David Ricardo

Bottom up thinkers try to start from experience and move from experience to understanding. They don't start with certain general principles they think beforehand are likely to be true; they just hope to find out what reality is like.
John Polkinghorne

Principles and rules are intended to provide a thinking man with a frame of reference.
Karl Von Clausewitz

There are three principles in a man's being and life, the principle of thought, the principle of speech, and the principle of action. The origin of all conflict between me and my fellow-men is that I do not say what I mean and I don't do what I say.
Martin Buber

We pay a price when we deprive children of the exposure to the values, principles, and education they need to make them good citizens.
Sandra Day O'Connor

The Vietnam War required us to emphasize the national interest rather than abstract principles. What President Nixon and I tried to do was unnatural. And that is why we didn't make it.
Henry A. Kissinger

While we should never give up our principles, we must also realize that we cannot maintain our principles unless we survive.
Henry A. Kissinger

The American foreign policy trauma of the sixties and seventies was caused by applying valid principles to unsuitable conditions.
Henry A. Kissinger

Failure comes only when we forget our ideals and objectives and principles.
Jawaharlal Nehru

The principles of living greatly include the capacity to face trouble with courage, disappointment with cheerfulness, and trial with humility.
Thomas S. Monson

The wretched have no compassion, they can do good only from strong principles of duty.
Samuel Johnson

Today, the theory of evolution is an accepted fact for everyone but a fundamentalist minority, whose objections are based not on reasoning but on doctrinaire adherence to religious principles.
James D. Watson

Sir, I wish to understand the true principles of the Government. I wish them carried out. I ask nothing more.
William Henry Harrison

In the rush for justice it is important not to lose sight of principles the country holds dear.
Kofi Annan

At the descriptive level, certainly, you would expect different cultures to develop different sorts of ethics and obviously they have; that doesn't mean that you can't think of overarching ethical principles you would want people to follow in all kinds of places.
Peter Singer

Men are limited by the knowledge of their minds, the worth of their characters and the principles upon which they are building their lives.
Edwin Louis Cole

God, great principle of all minor principles, God, who is Himself without a principle, could not conceive Himself, if, in order to do it, He required to know His own principle.
Giacomo Casanova

We should have a State in which we could live and breathe as free men and which we could develop according to our own lights and culture and where principles of Islamic social justice could find free play.
Muhammad Ali Jinnah

A person is born with desires of the eyes and ears, and a liking for beautiful sights and sounds. If he gives way to them, they will lead him to immorality and lack of restriction, and any ritual principles and propriety will be abandoned.
Xun Zi

Therefore, a person should first be changed by a teacher's instructions, and guided by principles of ritual. Only then can he observe the rules of courtesy and humility, obey the conventions and rules of society, and achieve order.
Xun Zi