„In every previous application of the quantum law, Planck's law, that the energy is h [Planck's constant] times the frequency, had been used to deduce the energy of a quantum when the frequency of the radiation was already known. In the present case the formula was used the other way; the energy of the emitted photon was known to begin with, and the formula was utilized to deduce its frequency. The frequencies calculated in this way are found to agree completely and exactly with those of the spectrum of hydrogen.“

Physics and Philosophy (1942)

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Albert Einstein photo

„Everything is energy and that's all there is to it. Match the frequency of the reality you want and you cannot help but get that reality. It can be no other way. This is not philosophy. This is physics.“

—  Albert Einstein German-born physicist and founder of the theory of relativity 1879 - 1955

There's no evidence that Einstein ever said this. (Source: http://quoteinvestigator.com/2012/05/16/everything-energy/.)
Misattributed

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Max Planck photo

„I also knew the formula that expresses the energy distribution in the normal spectrum. A theoretical interpretation therefore had to be found at any cost, no matter how high. It was clear to me that classical physics could offer no solution to this problem, and would have meant that all energy would eventually transfer from matter to radiation. ...This approach was opened to me by maintaining the two laws of thermodynamics. The two laws, it seems to me, must be upheld under all circumstances. For the rest, I was ready to sacrifice every one of my previous convictions about physical laws. ...[One] finds that the continuous loss of energy into radiation can be prevented by assuming that energy is forced at the outset to remain together in certain quanta. This was purely a formal assumption and I really did not give it much thought except that no matter what the cost, I must bring about a positive result.“

—  Max Planck German theoretical physicist 1858 - 1947

Letter to Robert W. Wood (October 7, 1931) in Archive for the History of Quantum Physics, Microfilm 66, 5, as cited in Thomas S. Kuhn, Black-Body Theory and the Quantum Discontinuity, 1894–1912 (1978) pp. 132, 288. Translation of the entire letter, which is follow above is in Armin Hermann, Frühgeschiche der Quantentheorie (1899–1913) Mosbach/Baden: Physik Verlag (1969), transl. Claude W. Nash, p. 23 of the translation; and also in M. S. Longair,Theoretical Concepts in Physics(Cambridge and NewYork: Cambridge University Press, 1984), ch. 6–12, p. 222. All as quoted/cited by Clayton A. Gearhart, "Planck, the Quantum, and the Historians" http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.613.4262&rep=rep1&type=pdf, Physics in Perspective, 4 (2002) 170-215.

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James Jeans photo
Wolfgang Pauli photo

„It seems significant that according to quantum physics the indestructibility of energy on one hand — which expresses its timeless existence — and the appearance of energy in space and time on the other hand correspond to two contradictory (complementary) aspects of reality.“

—  Wolfgang Pauli Austrian physicist, Nobel prize winner 1900 - 1958

"Modern Examples of Background Physics" ["Moderne Beispiele zur Hintergrundsphysik"] (1948) as translated by David Roscoe in Atom and Archetype (1992) edited by Carl Alfred Meier
Contexto: It seems significant that according to quantum physics the indestructibility of energy on one hand — which expresses its timeless existence — and the appearance of energy in space and time on the other hand correspond to two contradictory (complementary) aspects of reality. In fact, both are always present, but in individual cases the one or the other may be more pronounced.

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Samuel Johnson photo
Ilya Prigogine photo
George Boole photo
James Jeans photo

„Two a.m. in a dark alley or on a mountainside is not the time to discover your unit is missing a key piece of equipment, or that you are not sure of the radio frequencies of an adjacent unit.“

—  Wheeler L. Baker President of Hargrave Military Academy 1938

Fonte: Crisis Management: A Model For Managers (1993), p. 76
Contexto: Two a. m. in a dark alley or on a mountainside is not the time to discover your unit is missing a key piece of equipment, or that you are not sure of the radio frequencies of an adjacent unit. The procedural check lists created in training will prevent those critical and unacceptable mistakes. This is the time to benefit from those "lessons learned". But leaders must schedule the time to train, do it right, critique, and move on. It is an investment that will bring the most return.

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„Does life in some way make use of the potentiality for vast quantum superpositions, as would be required for serious quantum computation?“

—  Roger Penrose English mathematical physicist, recreational mathematician and philosopher 1931

Foreword (March 2007) to Quantum Aspects of Life (2008), by Derek Abbott.
Contexto: Does life in some way make use of the potentiality for vast quantum superpositions, as would be required for serious quantum computation? How important are the quantum aspects of DNA molecules? Are cellular microtubules performing some essential quantum roles? Are the subtleties of quantum field theory important to biology? Shall we gain needed insights from the study of quantum toy models? Do we really need to move forward to radical new theories of physical reality, as I myself believe, before the more subtle issues of biology — most importantly conscious mentality — can be understood in physical terms? How relevant, indeed, is our present lack of understanding of physics at the quantum/classical boundary? Or is consciousness really “no big deal,” as has sometimes been expressed?
It would be too optimistic to expect to find definitive answers to all these questions, at our present state of knowledge, but there is much scope for healthy debate...

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