There is no area of the world that should not be investigated by scientists. There will always remain some questions that have not been answered. In general, these are the questions that have not yet been posed.
Philosophy: A route of many roads leading from nowhere to nothing.
A hen is only an egg's way of making another egg.
If an elderly but distinguished scientist says that something is possible, he is almost certainly right; but if he says that it is impossible, he is very probably wrong.
... scientific research is compounded of ... empirical procedures, general speculative ideas, and mathematical or abstract reasoning.
It is a fool's prerogative to utter truths that no one else will speak.
As long as men are free to ask what they must, free to say what they think, free to think what they will, freedom can never be lost and science can never regress.
If we wish to make a new world we have the material ready. The first one, too, was made out of chaos.
Scientists, therefore, are responsible for their research, not only intellectually but also morally. This responsibility has become an important issue in many of today's sciences, but especially so in physics, in which the results of quantum mechanics and relativity theory have opened up two very different paths for physicists to pursue. They may lead us - to put it in extreme terms - to the Buddha or to the Bomb, and it is up to each of us to decide which path to take.
The high-minded man must care more for the truth than for what people think.
So long as the Universe had a beginning, we could suppose it had a creator. But if the Universe is really completely self-contained, it would have neither beginning or end, it would simply be. What place then for a creator?
I am compelled to fear that science will be used to promote the power of dominant groups rather than to make men happy.
The more original a discovery, the more obvious it seems afterwards.
A man's ethical behaviour should be based effectually on sympathy, education, and social ties and needs; no religious basis is necessary. Man would indeed be in a poor way if he had to be restrained by fear of punishment and hope of reward after death.
You cannot teach a man anything, you can only help him find it within himself.
I never think of the future - it comes soon enough.
It is the mark of an educated mind to be able to entertain a thought without accepting it.
The whole of science is nothing more than a refinement of everyday thinking.
Science is the systematic classification of experience.
An experiment is a question which science poses to Nature and a measurement is the recording of Nature's answer.
Crash programs fail because they are based on theory that, with nine women pregnant, you can get a baby in a month.
In these days, a man who says a thing cannot be done is quite apt to be interrupted by some idiot doing it.
Science is a wonderful thing if one does not have to earn one's living at it.
Listen; there's a hell of a good universe next door: let's go.
It is the tension between creativity and skepticism that has produced the stunning and unexpected findings of science.
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