"One strength of the communist system of the East is that it has some of the character of a religion and inspires the emotions of a religion. Unless the concept of peace based on law gathers behind it the force and zeal of a religion, it can hardly hope to succeed."

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"Besides agreeing with the aims of vegetarianism for aesthetic and moral reasons, it is my view that a vegetarian manner of living by its purely physical effect on the human temperament would most beneficially influence a lot of mankind."

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"That is simple, my friend. It is because Politics is more difficult than physics."

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"I was sitting in a chair in the patent office at Bern when all of sudden a thought occurred to me: If a person falls freely he will not feel his own weight. I was startled. This simple thought made a deep impression on me. It impelled me toward a theory of gravitation."

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"A truly rational theory would allow us to deduce the elementary particles (electron, etc.) and not be forced to state them a priori."

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"To think with fear of the end of one's life is pretty general with human beings. It is one of the means nature uses to conserve the life of the species. Approached rationally that fear is the most unjustified of all fears, for there is no risk of any accidents to one who is dead or not yet born. In short, the fear is stupid but it cannot be helped."

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"The important thing is not to stop questioning. Curiosity has its own reason for existence. One cannot help but be in awe when he contemplates the mysteries of eternity, of life, of the marvelous structure of reality. It is enough if one tries merely to comprehend a little of this mystery each day. Never lose a holy curiosity. ... Don't stop to marvel."

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"Most of us prefer to look outside rather than inside ourselves; for in the latter case we see but a dark hole, which means: nothing at all."

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"Had I known that the Germans would not succeed in producing an atomic bomb, I would not have lifted a finger."

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"And certainly we should take care not to make the intellect our god; it has, of course, powerful muscles, but no personality. It cannot lead, it can only serve; and it is not fastidious in its choice of a leader. This characteristic is reflected in the qualities of its priests, the intellectuals. The intellect has a sharp eye for methods and tools, but is blind to ends and values. So it is no wonder that this fatal blindness is handed on from old to young and today involves a whole generation."

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"What is significant in one's own existence one is hardly aware, and it certainly should not bother the other fellow. What does a fish know about the water in which he swims all his life?"

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"Without disarmament there can be no lasting peace. On the contrary, the continuation of military armaments in their present extent will with certainty lead to new catastrophies...For the creation of this public opinion in favor of disarmament every person living shares the responsibility, through ever deed and every word."

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"Only a life lived for others is a life worthwhile."

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"Now he has departed from this strange world a little ahead of me. That means nothing. People like us, who believe in physics, know that the distinction between past, present, and future is only a stubbornly persistent illusion."

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"The strange thing about growing old is that the intimate identification with the here and now is slowly lost; one feels transposed into infinity, more or less alone, no longer in hope or fear, only observing."

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"Generations to come, it may well be, will scarce believe that such a man as this one ever in flesh and blood walked upon this Earth."

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"Do not worry about your difficulties in Mathematics. I can assure you mine are still greater."

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"Sometimes one pays most for the things one gets for nothing."

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"I cannot imagine a God who rewards and punishes the objects of his creation, whose purposes are modeled after our own — a God, in short, who is but a reflection of human frailty. Neither can I believe that the individual survives the death of his body, although feeble souls harbor such thoughts through fear or ridiculous egotisms."

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"People like you and I, though mortal of course like everyone else, do not grow old no matter how long we live...[We] never cease to stand like curious children before the great mystery into which we were born."

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"We may assume the existence of an aether; only we must give up ascribing a definite state of motion to it, i.e. we must by abstraction take from it the last mechanical characteristic which Lorentz had still left it. ... But this ether may not be thought of as endowed with the quality characteristic of ponderable media, as consisting of parts which may be tracked through time. The idea of motion may not be applied to it."

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"Fundamental ideas play the most essential role in forming a physical theory. Books on physics are full of complicated mathematical formulae. But thought and ideas, not formulae, are the beginning of every physical theory. The ideas must later take the mathematical form of a quantitative theory, to make possible the comparison with experiment."

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"I think that only daring speculation can lead us further and not accumulation of facts."

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"Perfection of means and confusion of goals seem—in my opinion—to characterize our age."

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"I never think of the future. It comes soon enough."

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"No one can read the Gospels without feeling the actual presence of Jesus. His personality pulsates in every word. No myth is filled with such life."

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"I have expressed an opinion on public issues whenever they appeared to me so bad and unfortunate that silence would have made me feel guilty of complicity."

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"Great moral teachers of humanity were, in a certain sense, geniuses in the art of living more than in the art of thinking."

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"When I examine myself and my methods of thought I come to the conclusion that the gift of fantasy has meant more to me than my talent for absorbing positive knowledge."

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"Try and penetrate with our limited means the secrets of nature and you will find that, behind all the discernible concatenations, there remains something subtle, intangible and inexplicable. Veneration for this force beyond anything that we can comprehend is my religion. To that extent I am, in point of fact, religious."

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"As an eminent pioneer in the realm of high frequency currents... I congratulate you on the great successes of your life's work."

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"I see a clock, but I cannot envision the clockmaker. The human mind is unable to conceive of the four dimensions, so how can it conceive of a God, before whom a thousand years and a thousand dimensions are as one?"

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"It is easier to denature plutonium than it is to denature the evil spirit of man."

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"...to the question whether or not the motion of the Earth in space can be made perceptible in terrestrial experiments. We have already remarked... that all attempts of this nature led to a negative result. Before the theory of relativity was put forward, it was difficult to become reconciled to this negative result."

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"The only thing I can say is this: Only through permanent and faithful cooperation between the United States, Great Britain, and Russia can a lasting peace be secured."

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"In matters concerning truth and justice there can be no distinction between big problems and small; for the general principles which determine the conduct of men are indivisible. Whoever is careless with truth in small matters cannot be trusted in important affairs."

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"It appears dubious whether a field theory can account for the atomistic structure of matter and radiation as well as of quantum phenomena."

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"The pursuit of knowledge for its own sake, an almost fanatical love of justice and the desire for personal independence — these are the features of the Jewish tradition which make me thank my stars that I belong to it."

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"I never failed in mathematics. Before I was fifteen I had mastered differential and integral calculus."

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"I am very smart. But not as strong-hearted as all the workers on earth for he toils endlessly and does it all to feed his family while I do it merely for solving an impossible puzzle."

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"A new idea comes suddenly and in a rather intuitive way. But intuition is nothing but the outcome of earlier intellectual experience."

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"Ethical axioms are founded and tested not very differently from the axioms of science. Truth is what stands the test of experience."

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"[I do not] carry such information in my mind since it is readily available in books. ...The value of a college education is not the learning of many facts but the training of the mind to think."

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"It is enough for me to contemplate the mystery of conscious life perpetuating itself through all eternity, to reflect upon the marvelous structure of the universe which we dimly perceive, and to try humbly to comprehend an infinitesimal part of the intelligence manifested in nature."

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"I believe that whatever we do or live for has its causality; it is good, however, that we cannot see through to it."

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"One thing I have learned in a long life: that all our science, measured against reality, is primitive and childlike—and yet it is the most precious thing we have."

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"During that year in Aarau the question came to me: If one runs after a light wave with [a velocity equal to the] light velocity, then one would encounter a time-independent wavefield. However, something like that does not seem to exist! This was the first juvenile thought experiment which has to do with the special theory of relativity. Invention is not the product of logical thought, even though the final product is tied to a logical structure."

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"Try to become not a man of success, but try rather to become a man of value."

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"I am neither a German citizen nor do I believe in anything that can be described as a "Jewish faith." But I am a Jew and glad to belong to the Jewish people, though I do not regard it in any way as chosen."

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"I believe that pipe smoking contributes to a somewhat calm and objective judgment in all human affairs."

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