Philosophy Quotes

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

43879 quotes

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"What is the cause of all motion? And what rules its continuity?"
Isaac Newton
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"Empiricism without theory is empiricism; theory without empiricism is idealism."
Isaac Newton
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"The observer affects the observed by the act of observation."
Isaac Newton
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"Light and darkness are opposites, yet interdependent."
Isaac Newton
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"Every effect must have a cause; no cause exists without effect."
Isaac Newton
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"The universe is governed not by chance but by necessity."
Isaac Newton
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"To understand motion is to understand existence itself."
Isaac Newton
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"Every object persists in its state of rest unless acted upon by force."
Isaac Newton
I
"The path of the planet is determined by forces acting upon it."
Isaac Newton
"The laboratory is where philosophy becomes tangible reality."
Louis Pasteur
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"The only true wisdom is in knowing you know nothing."
Gupta, Akhil
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"The purpose of life is not to be happy. It is to be useful, to be honorable, to be compassionate."
Gupta, Akhil
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"Philosophy is the art of wondering about life."
Gupta, Akhil
"The most incomprehensible thing about the world is that it is comprehensible."
Albert Einstein
"Everything is relative."
Albert Einstein
"Refined people might entertain thoughts differently from the majority."
Albert Einstein
"Nothing is more important than perception."
Albert Einstein
"Morality is of the highest importance but for us, not for God."
Albert Einstein
"Reality is merely an illusion, albeit a very persistent one."
Albert Einstein
"The effort to understand the universe is one of the very few things that lifts human life a little above the level of farce."
Albert Einstein
"The universe is a grand book written in the language of mathematics."
Galileo Galilei
"It is a mathematical fact that the casting of this pebble from my hand has a necessary effect upon the universe - it is in the chain of cause and effect."
Galileo Galilei
"The sun teaches to us that the center of all life is burning, all-consuming, and eternal."
Galileo Galilei
"I cannot avoid having the consequence of my reflections."
Galileo Galilei
"Mathematics is the alphabet in which God has written the universe."
Galileo Galilei
"To understand God, study nature; to understand nature, study mathematics."
Galileo Galilei
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"I have always believed that science should serve humanity and improve the conditions of life for all people."
Marie Curie
"There is a grandeur in this view of life."
Charles Darwin
"I feel most deeply that this whole question of creation is too profound for the human intellect."
Charles Darwin
"A moral being is one who is capable of reflecting on his past actions and on their motives, of approving of some and disapproving of others."
Charles Darwin