"The really good music, whether of the East or of the West, cannot be analyzed."

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"What the inventive genius of mankind has bestowed upon us in the last hundred years could have made human life care free and happy if the development of the organizing power of man had been able to keep step with his technical advances. As it is, the hardly bought achievements of the machine age in the hands of our generation are as dangerous as a razor in the hands of a three-year-old child. The possession of wonderful means of production has not brought freedom-only care and hunger."

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"A new type of thinking is essential if mankind is to survive and move toward higher levels."

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"In the light of knowledge attained, the happy achievement seems almost a matter of course, and any intelligent student can grasp it without too much trouble. But the years of anxious searching in the dark, with their intense longing, their alternations of confidence and exhaustion, and the final emergence into the light—only those who have experienced it can understand that."

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"When a man after long years of searching chances on a thought which discloses something of the beauty of this mysterious universe, he should not therefore be personally celebrated. He is already sufficiently paid by his experience of seeking and finding. In science, moreover, the work of the individual is so bound up with that of his scientific predecessors and contemporaries that it appears almost as an impersonal product of his generation."

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"I want to go when I want. It is tasteless to prolong life artificially. I have done my share; it is time to go. I will do it elegantly."

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"I have repeatedly said that in my opinion the idea of a personal God is a childlike one. You may call me an agnostic, but I do not share the crusading spirit of the professional atheist whose fervor is mostly due to a painful act of liberation from the fetters of religious indoctrination received in youth. I prefer an attitude of humility corresponding to the weakness of our intellectual understanding of nature and of our own being."

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"Life is like riding a bicycle. To keep your balance you must keep moving."

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"One may say "the eternal mystery of the world is its comprehensibility."

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"The most beautiful fate of a physical theory is to point the way to the establishment of a more inclusive theory, in which it lives on as a limiting case."

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"I received your letter of June 10th. I have never talked to a Jesuit priest in my life and I am astonished by the audacity to tell such lies about me. From the viewpoint of a Jesuit priest I am, of course, and have always been an atheist."

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"Why is it nobody understands me and everybody likes me?"

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"I lie on the beach like a crocodile and let myself be roasted by the sun. I never see a newspaper and don't give a damn for what is called the world."

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"In Lenin I honor a man, who in total sacrifice of his own person has committed his entire energy to realizing social justice. I do not find his methods advisable. One thing is certain, however: men like him are the guardians and renewers [Erneuerer] of mankind's conscience."

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"I live in that solitude which is painful in youth, but delicious in the years of maturity."

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"I advocate world government because I am convinced that there is no other possible way of eliminating the most terrible danger in which man has ever found himself. The objective of avoiding total destruction must have priority over any other objective."

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"The whole of science is nothing more than a refinement of every day [sic] thinking."

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"The mass of a body is a measure of its energy content."

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"I’m a magnet for all the crackpots in the world, but they are of interest to me, too. A favourite pastime of mine is to reconstruct their thinking processes. I feel genuinely sorry for them, that’s why I try to help them."

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"There is not the slightest indication that [nuclear energy] will ever be obtainable. It would mean that the atom would have to be shattered at will."

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"What lead me more or less directly to the special theory of relativity was the conviction that the electromotive force acting on a body in motion in a magnetic field was nothing else but an electric field."

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"Since the mathematicians have invaded the theory of relativity, I do not understand it myself anymore."

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"For scientific endeavor is a natural whole the parts of which mutually support one another in a way which, to be sure, no one can anticipate."

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"anti-Semitism is nothing but the antagonistic attitude produced in non-Jews by the Jewish group. This is a normal social reaction."

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"The development during the present century is characterized by two theoretical systems essentially independent of each other: the theory of relativity and the quantum theory. The two systems do not directly contradict each other; but they seem little adapted to fusion into one unified theory."

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"If A is success in life, then A = x + y + z. Work is x, play is y and z is keeping your mouth shut."

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"Whether you can observe a thing or not depends on the theory which you use. It is the theory which decides what can be observed."

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"All knowledge of reality starts from experience and ends in it. Propositions arrived at by purely logical means are completely empty as regards reality. Because Galileo saw this, and particularly because he drummed it into the scientific world, he is the father of modern physics – indeed, of modern science altogether."

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"The standard bearers have grown weak in the defense of their priceless heritage, and the powers of darkness have been strengthened thereby. Weakness of attitude becomes weakness of character; it becomes lack of power to act with courage proportionate to danger. All this must lead to the destruction of our intellectual life unless the danger summons up strong personalities able to fill the lukewarm and discouraged with new strength and resolution."

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"I have come to believe that the motion of the Earth cannot be detected by any optical experiment."

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"Combinatory play seems to be the essential feature in productive thought — before there is any connection with logical construction in words or other kinds of signs which can be communicated to others."

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"It gives me great pleasure, indeed, to see the stubbornness of an incorrigible nonconformist warmly acclaimed."

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"I am fascinated by Spinoza's pantheism, but I admire even more his contribution to modern thought because he is the first philosopher to deal with the soul and body as one, and not two separate things."

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"It can scarcely be denied that the supreme goal of all theory is to make the irreducible basic elements as simple and as few as possible without having to surrender the adequate representation of a single datum of experience."

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"May they not forget to keep pure the great heritage that puts them ahead of the West: the artistic configuration of life, the simplicity and modesty of personal needs, and the purity and serenity of the Japanese soul."

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"That is simple my friend: because politics is more difficult than physics."

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"Everyone who is seriously involved in the pursuit of science becomes convinced that some spirit is manifest in the laws of the universe, one that is vastly superior to that of man."

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"We shall, therefore, assume the complete physical equivalence of a gravitational field and a corresponding acceleration of the reference system."

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"Today the atomic bomb has altered profoundly the nature of the world as we know it, and the human race consequently finds itself in a new habitat to which it must adapt its thinking."

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"I believe in intuition and inspiration. ... At times I feel certain I am right while not knowing the reason. When the eclipse of 1919 confirmed my intuition, I was not in the least surprised. In fact I would have been astonished had it turned out otherwise. Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research."

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"If I would be a young man again and had to decide how to make my living, I would not try to become a scientist or scholar or teacher. I would rather choose to be a plumber or a peddler in the hope to find that modest degree of independence still available under present circumstances."

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"In Russia the equality of all national and cultural groups is not merely nominal but is actually practiced."

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"I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones."

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"It is quite possible to be both. I look upon myself as a man. Nationalism is an infantile disease. It is the measles of mankind."

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"Einstein's manner was full of charm and bonhomie. He enjoyed a joke and had many a jibe at the Nazi Professors, one hundred of whom in a book had condemned his theory. "Were I wrong," he said, "one professor would have been quite enough." Also, in speaking of Nazis, he once said: "I thought I was a Physicist, I did not bother about being a Jew until Hitler made me conscious of it."

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"Development of Western Science is based on two great achievements, the invention of the formal logical system (in Euclidean geometry) by the Greek philosophers, and the discovery of the possibility to find out causal relationships by systematic experiment (Renaissance). In my opinion one has not to be astonished that the Chinese sages have not made these steps. The astonishing thing is that these discoveries were made at all."

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"Taken on the whole, I would believe that Gandhi's views were the most enlightened of all the political men in our time. We should strive to do things in his spirit... not to use violence in fighting for our cause, but by non-participation in what we believe is evil."

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"The highest principles for our aspirations and judgments are given to us in the Jewish-Christian religious tradition. It is a very high goal which, with our weak powers, we can reach only very inadequately, but which gives a sure foundation to our aspirations and valuations."

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"I am a determinist. As such, I do not believe in free will. The Jews believe in free will. They believe that man shapes his own life. I reject that doctrine philosophically. In that respect, I am not a Jew."

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"The work on satisfactory formulation of technical patents was a true blessing for me. It compelled me to be many-sided in thought, and also offered important stimulation for thought about physics. Following a practical profession is a blessing for people of my type. Because the academic career puts a young person in a sort of compulsory situation to produce scientific papers in impressive quantity, a temptation to superficiality arises that only strong characters are able to resist."

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