Four-Word Letter, Pt 2.
Catch For Us The Foxes (2004)
“If you take a bale of hay and tie it to the tail of a mule and then strike a match and set the bale of hay on fire, and if you then compare the energy expended shortly thereafter by the mule with the energy expended by yourself in the striking of the match, you will understand the concept of amplification.”
As quoted in The Chip War : The Battle for the World of Tomorrow (1989) by Fred Warshofsky, p. 21.
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William Shockley 5
American physicist and inventor 1910–1989Related quotes
“To set a forest on fire, you light a match. To set a character on fire, you put him in conflict.”
Source: How to Write a Damn Good Novel: A Step-by-Step No Nonsense Guide to Dramatic Storytelling

Address to the Society for Psychical Research (1897)
Context: The clock runs down. I lift the weight by exerting the proper amount of energy, and in this action the law of conservation of energy is strictly obeyed. But now I have the choice of either letting the weight fall free in a fraction of a second, or, constrained by the wheelwork, in twenty-four hours. I can do which I like, and whichever way I decide, no more energy is developed in the fall of the weight. I strike a match; I can use it to light a cigarette or to set fire to a house. I write a telegram; it may be simply to say I shall be late for dinner, or it may produce fluctuations on the stock exchange that will ruin thousands. In these cases the actual force required in striking the match or in writing the telegram is governed by the law or conservation of energy; but the vastly more momentous part, which determines the words I use or the material I ignite, is beyond such a law. It is probable that no expenditure of energy need be used in the determination of direction one way more than another. Intelligence and free will here come into play, and these mystic forces are outside the law of conservation of energy as understood by physicists.

“Nobody realizes that some people expend tremendous energy merely to be normal.”
This quotation is from Notebook IV in Notebooks: 1942-1951, not Myth of Sisyphus. The quotation appears in none of Camus books you find in bookstores
The Myth of Sisyphus (1942), An Absurd Reasoning

War (1816)
Context: The influence of war on the community at large, on its prosperity, its morals, and its political institutions, though less striking than on the soldiery, is yet baleful. How often is a community impoverished to sustain a war in which it has no interest?

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

“A match made in Heaven, set the fires in Hell”
Albums, Lupe Fiasco's The Cool (2007)

Song lyrics, Bringing It All Back Home (1965), It's All Over Now, Baby Blue

(Ch. 6) "Old Man"; p. 160
The Wild Palms [If I Forget Thee, Jerusalem] (1939)