“The Law of conservation of energy tells us we can't get something for nothing, but we refuse to believe it.”

— Isaac Asimov

Book of Science and Nature Quotations (1988)
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Isaac Asimov 303

American writer and professor of biochemistry at Boston Uni… 1920–1992

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“As we can not give a general definition of energy, the principle of the conservation of energy signifies simply that there is something which remains constant.”

Henri Poincaré book The Value of Science

Comme nous ne pouvons pas donner de l'énergie une définition générale, le principe de la conservation de l'énergie signifie simplement qu'il y a quelque chose qui demeure constant.
Source: The Value of Science (1905), Ch. 10: Is Science artificial?

“Fiction doesn’t tell us something we don’t know, it tells us something we know but don’t know that we know.”

Walker Percy (1916–1990) Southern philosophical novelist

“Even today, there persists… a feeling that the creation of the Universe out of nothing must violate some basic conservation law that stops one from getting something for nothing. Nevertheless, there is actually no evidence that the Universe as a whole possesses a non-zero value of any such conserved quantity. The total mass-energy of all the constituents of a finite Universe appears to be always equal in magnitude but opposite in sign to the total gravitational potential energies of those particles. …Similarly, there is no evidence that the Universe possesses any overall net rotation or electric charge.”

John D. Barrow (1952–2020) British scientist

New Theories of Everything (2007)

“If you listen to a lot of conservatives, they'll tell you that the difference between them and us is that conservatives love America and liberals hate America. … They don't get it. We love America just as much as they do. But in a different way.”

Al Franken (1951) American comedian and politician

Lies: And the Lying Liars Who Tell Them (2003)
Context: If you listen to a lot of conservatives, they'll tell you that the difference between them and us is that conservatives love America and liberals hate America.... They don't get it. We love America just as much as they do. But in a different way. You see, they love America like a 4-year-old loves his mommy. Liberals love America like grown-ups. To a 4-year-old, everything Mommy does is wonderful and anyone who criticizes Mommy is bad. Grown-up love means actually understanding what you love, taking the good with the bad and helping your loved one grow. Love takes attention and work and is the best thing in the world.
That's why we liberals want America to do the right thing. We know America is the hope of the world, and we love it and want it to do well.