You can shear a sheep a hundred times, but you can skin it only once.
It seems a little paradoxical to construct a configuration space with the coordinates of points which do not exist.
The actual state of our knowledge is always provisional and. . . there must be, beyond what is actually known, immense new regions to discover.
We are not sufficiently astonished by the fact that any science may be possible.
Two seemingly incompatible conceptions can each represent an aspect of the truth. . . They may serve in turn to represent the facts without ever entering into direct conflict.
In space-time everything which for each of us constitutes the past, the present and the future is given en bloc. . . Each observer, as his time passes, discovers, so to speak, new slices of space-time which appear to him as successive aspects of the material world, though in reality the ensemble of events constituting space-time exist prior to his knowledge of them.
The history of science shows that the progress of science has constantly been hampered by the tyrannical influence of certain conceptions that finally came to be considered as dogma. For this reason, it is proper to submit periodically to a very searching examination, principles that we have come to assume without any more discussion.
I have no problem with thinking small. Sometimes you have to think small first in order to think big.
The theory of high-intensity, anaerobic, bodybuilding exercise is not true because I or anyone else, no matter how many might agree, say it is true. It is the fact that the logic of the theory is unassailable which makes it true.
Nature is not a place to visit. It is home.
I decided to go into politics because my children are growing up, and I became worried about the ways things are being handled in this country. I felt there's a lost generation of people who feel misrepresented, and that they're doing their best for the country but the country is not doing its best for them. We are all looking at our children and wondering whether or not they will see their future in Israel. They looked at the country before the last elections and saw it becoming more and more Orthodox. There was a strong sense of unfairness.