Philosophy Quotes

Questions about meaning, existence, and truth from thinkers who spent their lives searching for answers.

43879 quotes

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"All civilizations become either spacefaring or extinct."
Carl Sagan
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"There is a gulf of mutual incomprehension between science and the humanities."
Carl Sagan
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"All things considered, I believe that the universe is probably best described by saying that it is weird."
Carl Sagan
C
"We live in a very complex world with many ways of knowing."
Carl Sagan
C
"The size and age of the world must be taken into account when we are trying to understand it."
Carl Sagan
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"Humans are not the end result of predictable evolutionary progress."
Stephen Jay Gould
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"We are infinitesimal parts of an incomprehensibly vast cosmos."
Stephen Jay Gould
S
"Randomness and determinism are not opposites but dance partners."
Stephen Jay Gould
S
"The universe is not designed with human welfare in mind."
Stephen Jay Gould
S
"We are part of nature, not separate from it."
Stephen Jay Gould
S
"The universe is indifferent to our desires and aspirations."
Stephen Jay Gould
J
"We cannot solve the environmental crisis without solving the crisis within ourselves."
Jane Goodall
J
"We are all connected in ways we are only beginning to understand."
Jane Goodall
N
"We are suspended in language in such a way that we cannot say what is up and what is down."
Niels Bohr
N
"One should as a rule respect public opinion in so far as is necessary to avoid starvation and to prevent oneself from being deserted in the street by all one's acquaintances."
Niels Bohr
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"The paradoxes of logic and set theory, which have so troubled the mathematicians, find their solution in the fact that the axioms of formal logic are not applicable to reality."
Niels Bohr
N
"Just as in a theatrical play one is moved by fictitious joys and sorrows, so too in actual life one is concerned with fictions."
Niels Bohr
N
"An independent reality in the physical sense is an unwarranted causality."
Niels Bohr
N
"Reality is merely an illusion, albeit a very persistent one."
Niels Bohr
N
"We must be clear that when it comes to atoms, language can be used only as in poetry."
Niels Bohr
N
"The great difference between science and philosophy is that science asks questions it can answer, while philosophy asks questions it cannot."
Niels Bohr
N
"Those who attempt to found a system of philosophy without having mastered mathematics are lost."
Niels Bohr
N
"We cannot know, as a matter of principle, the present in all its details."
Niels Bohr
N
"If you have not yet discovered paradoxes in nature, you have not yet begun to think deeply."
Niels Bohr
"To develop a system of values, you must think hard about what you really care about."
Richard Feynman
"The real problem is that the way we think about the world is wrong."
Richard Feynman
"What is it about nature that lets it work so simply?"
Richard Feynman
M
"I regard consciousness as fundamental. I regard matter as derivative from consciousness."
Max Planck
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"The study of physics will always involve a certain amount of philosophy and metaphysical thinking."
Max Planck
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"A physicist looks at the world not as it appears to be, but as it fundamentally is beneath surface appearances."
Max Planck