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We shall therefore assume the complete physical equivalence of a gravitational field and a corresponding acceleration of the reference system.
--
Statement of the equivalence principle in Yearbook of Radioactivity and Electronics (1907)

 

Albert Einstein

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I just want to explain what I mean when I say that we should try to hold on to physical reality.
We are ... all aware of the situation regarding what will turn out to be the basic foundational concepts in physics: the point-mass or the particle is surely not among them; the field, in the Faraday-Maxwell sense, might be, but not with certainty. But that which we conceive as existing ("real") should somehow be localized in time and space. That is, the real in one part of space, A, should (in theory) somehow "exist" independently of that which is thought of as real in another part of space, B. If a physical system stretches over A and B, then what is present in B should somehow have an existence independent of what is present in A. What is actually present in B should thus not depend the type of measurement carried out in the part of space A; it should also be independent of whether or not a measurement is made in A.
If one adheres to this program, then one can hardly view the quantum-theoretical description as a complete representation of the physically real. If one attempts, nevertheless, so to view it, then one must assume that the physically real in B undergoes a sudden change because of a measurement in A. My physical instincts bristle at that suggestion.
However, if one renounces the assumption that what is present in different parts of space has an independent, real existence, then I don't see at all what physics is supposed to be describing. For what is thought to be a "system" is after all, just conventional, and I do not see how one is supposed to divide up the world objectively so that one can make statements about parts.

 

Albert Einstein

 

The universe would have expanded in a smooth way from a single point. As it expanded, it would have borrowed energy from the gravitational field, to create matter. As any economist could have predicted, the result of all that borrowing, was inflation. The universe expanded and borrowed at an ever-increasing rate. Fortunately, the debt of gravitational energy will not have to be repaid until the end of the universe.

 

Stephen Hawking

 

Moral equivalence is a term of propaganda that was invented to try to prevent us from looking at the acts for which we are responsible. [...] There is no such notion. There are many different dimensions and criteria. For example, there's no moral equivalence between the bombing of the World Trade Center and the destruction of Nicaragua or of El Salvador, of Guatemala. The latter were far worse, by any criterion. So there's no moral equivalence.

 

Noam Chomsky

 

All meaning alters with acceleration, because all patterns of personal and political interdependence change with any acceleration of information. (p. 178-179)

 

Marshall McLuhan

 

To say that a body or its gravitational field 'bends in space' in its vicinity is the discuss visual space in acoustic terms.

 

Marshall McLuhan