In principle the great religions of the world do not differ as much as they appear to.
Ernest Holmes

Here is my principle: Taxes shall be levied according to ability to pay. That is the only American principle.
Franklin D. Roosevelt

I have been a selfish being all my life, in practice, though not in principle.
Jane Austen

You will reciprocally promise love, loyalty and matrimonial honesty. We only want for you this day that these words constitute the principle of your entire life and that with the help of divine grace you will observe these solemn vows that today, before God, you formulate.
Pope John Paul II

The universal order and the personal order are nothing but different expressions and manifestations of a common underlying principle.
Marcus Aurelius

If we do discover a complete theory, it should be in time understandable in broad principle by everyone. Then we shall all, philosophers, scientists, and just ordinary people be able to take part in the discussion of why we and the universe exist.
Stephen Hawking

The dread of evil is a much more forcible principle of human actions than the prospect of good.
John Locke

The principle that human nature, in its psychological aspects, is nothing more than a product of history and given social relations removes all barriers to coercion and manipulation by the powerful.
Noam Chomsky

The theory of evolution by cumulative natural selection is the only theory we know of that is in principle capable of explaining the existence of organized complexity.
Richard Dawkins

If there is any principle of the Constitution that more imperatively calls for attachment than any other it is the principle of free thought, not free thought for those who agree with us but freedom for the thought that we hate.
Oliver Wendell Holmes

I begin with the principle that all men are bores. Surely no one will prove himself so great a bore as to contradict me in this.
Soren Kierkegaard

There are many men of principle in both parties in America, but there is no party of principle.
Alexis de Tocqueville

Wars based on principle are far more destructive... the attacker will not destroy that which he is after.
Alan Watts

All human actions are equivalent and all are on principle doomed to failure.
Jean-Paul Sartre

I have called this principle, by which each slight variation, if useful, is preserved, by the term of Natural Selection.
Charles Darwin

The first principle of success is desire - knowing what you want. Desire is the planting of your seed.
Robert Collier

Act that your principle of action might safely be made a law for the whole world.
Immanuel Kant

The only objects of practical reason are therefore those of good and evil. For by the former is meant an object necessarily desired according to a principle of reason; by the latter one necessarily shunned, also according to a principle of reason.
Immanuel Kant

So act that your principle of action might safely be made a law for the whole world.
Immanuel Kant

Virtue cannot separate itself from reality without becoming a principle of evil.
Albert Camus