Ethics and equity and the principles of justice do not change with the calendar.

If diffraction or interference phenomena were to be sought it was therefore necessary, in accordance with the basic principles of wave theory, to select for the test arrangement far smaller decisive dimensions than those employed in corresponding tests with visible light.

All married couples should learn the art of battle as they should learn the art of making love. Good battle is objective and honest - never vicious or cruel. Good battle is healthy and constructive, and brings to a marriage the principles of equal partnership.

I bought some books in order to learn the first principles of philosophy.

Its easy to have principles when you're rich. The important thing is to have principles when you're poor.

I consider no man honest who does not observe towards other nations the principles which he desires to be observed towards his own: and therefore I will not interfere in your domestic questions.

The principles of true art is not to portray, but to evoke.

The individual makes a clear effort to define moral values and principles that have validity and application apart from the authority of the groups of persons holding them and apart from the individual's own identification with the group.

By the time I returned to Czechoslovakia, I had an understanding of the principles of the market.

I also helped write the five-page statement of principles that Civic Forum issued in late November. That was the first public expression of what the new government wanted to do.

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

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.

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

In the early centuries of Islam, the great schools of Islamic jurisprudence were built upon the above principles. Basic to all their legal systems they developed the doctrine that liberty is the fundamental basis of law.

It is not necessary to dwell on the political and social principles of Islam, to underline how close they also are in spirit to the concepts of human rights which govern the political and social systems of the West.