There is no concept in the whole field of physics which is more difficult to understand than is the concept of entropy, nor is there one which is more fundamental.
--
Francis Weston Sears (1950). Mechanics, heat and sound, Addison-Wesley principles of physics series Volume 1, 2nd Edition. Addison-Wesley Press. p. 447.Francis Sears
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The fundamental concept in social science is Power, in the same sense in which Energy is the fundamental concept in physics.
Bertrand Russell
The concept of absolute, hence (or whence) springs, in the moral field, the moral laws or norms, represent, in the field of knowledge, the principle of identity, which is the fundamental law of the thought; norms of logic springs from it, that govern the thought (or mind) in the field of science." ("Le concept de l'absolu, d'o? découlent, dans le domaine moral, les lois ou normes morales, constitue, le principe d'identité, qui est la loi fondamentale de la pensée; il en découle les normes logiques qui régissent la pensée dans le domaine de la science.")
African Spir
One of the key benefits that emerges from the Global Peace Index is the concept of measuring peace. It is very difficult to understand what we can’t measure. It is also very difficult to understand the effectiveness of our actions without measurements.
Steve Killelea
I think of physics as the liberal arts of technology. You understand the fundamental aspects of physics, and then you can learn the technology and understand how it relates to current world problems. I'm teaching the elementary physics that is most useful for someone who is trying to live in a technological world, to contribute to that world, and to make correct decisions.
Richard A. Muller
Reality is reality. It transcends every concept. There is no concept which can adequately describe it, not even the concept of interdependence.
Thich Nhat Hanh
Sears, Francis
Secombe, Harry
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