Philosophy Quotes

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

43879 quotes

M
"Every man who has thought deeply about existence recognizes that it is a kind of mystery."
Max Planck
M
"The man does not belong to himself, but to the law of the universe."
Max Planck
N
"Writing the name of a thing is like a murder—a sacrilege."
Niels Bohr
N
"It is very important that a person should develop great ideas about life."
Niels Bohr
N
"An unbridgeable gulf separates subjective emotional experiences from the formulations of physical science."
Niels Bohr
N
"The problem lies not in the physics but in the philosophy."
Niels Bohr
L
"The study of atoms reveals the unity underlying all creation."
Linus Pauling
L
"I believe that science and philosophy should walk together hand in hand."
Linus Pauling
L
"In chemistry, as in life, everything is connected to everything else."
Linus Pauling
W
"I think that modern physics has definitely decided in favor of Plato. In fact the smallest units of matter are not physical objects in the ordinary sense; they are forms, ideas which can be expressed unambiguously only in mathematical language."
Werner Heisenberg
W
"I think that the structure of the physical world is rational."
Werner Heisenberg
W
"The alternative to Cartesian dualism is not materialism, but rather a different understanding of matter and mind."
Werner Heisenberg
W
"The positivists have a simple solution: the world must be divided into that which we can say clearly and the rest, which we must pass over in silence."
Werner Heisenberg
W
"What is the world made of? We have found that it is not made of material substance. The stuff of the world is mind-stuff."
Werner Heisenberg
W
"The methods of natural science cannot answer the questions of human values and human meaning."
Werner Heisenberg
E
"The mind that is certain is a mind that has stopped growing."
Ernest Rutherford
E
"Our understanding of matter is but a shadow on the cave wall of reality."
Ernest Rutherford
E
"The philosopher and the scientist are not opposites; they are partners in wonder."
Ernest Rutherford
E
"The real problem of humanity is the following: we have Paleolithic emotions; medieval institutions; and godlike technology."
Enrico Fermi
E
"The apparent contradiction between the enormity of the universe and the tininess of man is resolved in the fact that man is the only means by which the universe comes to know itself."
Enrico Fermi
E
"The greatest challenge is not in understanding the universe, but in understanding why humans are so often irrational."
Enrico Fermi
E
"The universe is not hostile, nor yet is it friendly. It is simply indifferent."
Enrico Fermi
E
"Every paradox contains within it the seeds of a profound truth."
Enrico Fermi
E
"The grandeur of the universe is matched only by our capacity to comprehend it."
Enrico Fermi
R
"I am not interested in the philosophy of science; I am interested in the practice of it."
Rosalind Franklin
D
"Science is the conversation between the human mind and the natural world."
Dorothy Hodgkin
N
"The great extension of our experience in recent years has brought light to the insufficiency of our simple mechanical conceptions."
Niels Bohr
N
"Everything we call real is made of things that cannot be regarded as real."
Niels Bohr
N
"We are suspended in language in such a way that we cannot say what is up and what is down."
Niels Bohr
N
"The human mind is both the tool and the subject of physics."
Niels Bohr