Principles are fundamental truths that serve as the foundations for behavior that gets you what you want out of life. They can be applied again and again in similar situations to help you achieve your goals.

foundational principles — don’t criticize, condemn, or complain; talk about others’ interests; if you’re wrong, admit it; let others save face. Such principles don’t make you a clever conversationalist or a resourceful raconteur. They remind you to consider others’ needs before you speak. They encourage you to address difficult subjects honestly and graciously. They prod you to become a kinder, humbler manager, spouse, colleague, salesperson, and parent. Ultimately, they challenge you to gain influence in others’ lives not through showmanship or manipulation but through a genuine habit of expressing greater respect, empathy, and grace.

Principles are what people have instead of God.
To be a Christian means among other things to be willing if necessary to sacrifice even your highest principles for God's or your neighbour's sake the way a Christian pacifist must be willing to pick up a baseball bat if there's no other way to stop a man from savagely beating a child.
Jesus didn't forgive his executioners on principle but because in some unimaginable way he was able to love them.
'Principle' is an even duller word than 'Religion'.

A rule says, “You must do it this way.” A principle says, “This works … and has through all remembered time.

Those are my principles, and if you don't like them...well I have others.

Principles are like lighthouses. They are natural laws that cannot be broken. As Cecil B. DeMille observed of the principles contained in his monumental movie, The Ten Commandments, “It is impossible for us to break the law. We can only break ourselves against the law.” While

When people in authority want the rest of us to behave, it matters — first and foremost — how they behave. This is called the “principle of legitimacy,” and legitimacy is based on three things. First of all, the people who are asked to obey authority have to feel like they have a voice — that if they speak up, they will be heard. Second, the law has to be predictable. There has to be a reasonable expectation that the rules tomorrow are going to be roughly the same as the rules today. And third, the authority has to be fair. It can’t treat one group differently from another. All good parents understand these three principles implicitly. If you want to stop little Johnnie from hitting his sister, you can’t look away one time and scream at him another. You can’t treat his sister differently when she hits him. And if he says he really didn’t hit his sister, you have to give him a chance to explain himself. How you punish is as important as the act of punishing itself.

principle, per-sis tence, and compassion — three

Consequences are governed by principles, and behavior is governed by values, therefore, value principles!

Principles are the territory. Values are maps. When we value correct principles, we have truth — a knowledge of things as they are.

The principle of social proof says so: The greater the number of people who find any idea correct, the more the idea will be correct.

There are no principles; there are only events. There is no good and bad, there are only circumstances. The superior man espouses events and circumstances in order to guide them. If there were principles and fixed laws, nations would not change them as we change our shirts and a man can not be expected to be wiser than an entire nation.

In conformity with all that has been said on the subject up to the present, two fundamental principles reign throughout the whole plan of the war, and serve as a guide for everything else.

The first is: to reduce the weight of the enemy’s power into as few centres of gravity as possible, into one if it can be done; again, to confine the attack against these centres of force to as few principal undertakings as possible, to one if possible; lastly, to keep all secondary undertakings as subordinate as possible. In a word, the first principle is, <i>to act concentrated as much as possible.</i>

The second principle runs thus <i>to act as swiftly as possible;</i> therefore, to allow of no delay or detour without sufficient reason.

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