General relativity is a simple theory...It's just geometry.
Kip Thorne
I do not see any reason to assume that the heuristic significance of the principle of general relativity is restricted to gravitation and that the rest of physics can be dealt with separately on the basis of special relativity, with the hope that later on the whole may be fitted consistently into a general relativistic scheme. I do not think that such an attitude, although historically understandable, can be objectively justified. The comparative smallness of what we know today as gravitational effects is not a conclusive reason for ignoring the principle of general relativity in theoretical investigations of a fundamental character. In other words, I do not believe that it is justifiable to ask: What would physics look like without gravitation?
Albert Einstein
It is almost impossible to have a baseless snobbish opinion of the General Theory of Relativity.
Michael Moorcock
Relativity propped it up, at least gave it the illusion of being there...the way all reality becomes illusory and observer-oriented when you study general relativity. Or Buddhism. Or get drafted.
Joe Haldeman
The 4D style, or cosmic comics and relativistic humor, is based on Einstein's theory of relativity and I came up with it 20 years ago. 4D works use the idea of the fourth dimension and time, playing on such surrealistic and amazing subjects as motion relativity, space curvature and time dilation.
Javad Alizadeh
Einstein is the only figure in the physical sciences with a stature that can be compared with Newton. Newton is reported to have said "If I have seen further than other men, it is because I stood on the shoulders of giants." This remark is even more true of Einstein who stood on the shoulders of Newton. Both Newton and Einstein put forward a theory of mechanics and a theory of gravity but Einstein was able to base General Relativity on the mathematical theory of curved spaces that had been constructed by Riemann while Newton had to develop his own mathematical machinery. It is therefore appropriate to acclaim Newton as the greatest figure in mathematical physics and the Principia is his greatest achievement.
Stephen Hawking
Thorne, Kip
Thornton, Melanie
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