Philosophy Quotes

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

43879 quotes

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"What we observe is not nature itself, but nature exposed to our method of questioning."
Niels Bohr
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"We are children of the universe exploring itself."
Niels Bohr
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"Reality is a collaborative creation between observer and observed."
Niels Bohr
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"The atoms or elementary particles themselves are not real; they form a world of potentialities or possibilities rather than one of things or facts."
Max Planck
M
"I regard consciousness as fundamental. I regard matter as derivative from consciousness."
Max Planck
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"I regard matter as derivative from consciousness."
Max Planck
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"It is the constant tension between faith and reason that defines human progress."
Max Planck
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"The universe is not only queerer than we suppose, but queerer than we can suppose."
Max Planck
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"Every scientific theory is provisional and subject to revision."
Max Planck
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"Those who understand the quantum world find themselves humbled by its mystery."
Max Planck
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"The universe speaks to us through the language of natural laws."
Max Planck
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"Science can work on questions of fact, but not on issues of meaning and value."
Stephen Jay Gould
S
"Progress is not inherent in the evolutionary process itself."
Stephen Jay Gould
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"Life on Earth has no predetermined destination or ultimate purpose."
Stephen Jay Gould
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"The history of life shows that nothing is inevitable or predetermined."
Stephen Jay Gould
S
"Evolution has no ultimate goal, no intended destination, no final purpose."
Stephen Jay Gould
S
"We are here by chance, not by design or destiny."
Stephen Jay Gould
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"The constant tension between creativity and skepticism is the unfailing hallmark of a rational mind."
Enrico Fermi
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"In the long run, the market is a weighing machine."
Enrico Fermi
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"What is the answer? And upon reflection, what is the question?"
Enrico Fermi
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"Philosophy is the art of being confused at a higher level of sophistication."
Enrico Fermi
E
"Every physicist must confront the fundamental questions about the nature of reality."
Ernest Rutherford
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"The physical world operates according to principles we can understand through careful study."
Rosalind Franklin
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"The universe is rational; therefore, through reason, we can understand it."
Rosalind Franklin
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"One should as a rule respect public opinion in so far as is necessary to avoid starvation and to prevent oneself from being cast into prison."
Werner Heisenberg
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"What can we say about reality when we are by definition excluded from it?"
Werner Heisenberg
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"I am now convinced that theoretical physics is actual philosophy."
Werner Heisenberg
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"The observation that the universe is comprehensible is the beginning of philosophy."
Werner Heisenberg
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"The deepest principle of existence is cause and effect."
Werner Heisenberg
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"The principle of scientific parsimony demands that we employ the simplest consistent model."
Werner Heisenberg