In classical Newtonian physics there was a clear understanding of 'what reality is'. Indeed in this classical view, reality at a certain time is the collection of all what is actual at this time, and this is contained in 'the present'. Often it is stated that three dimensional space and one dimensional time have been substituted by four dimensional space-time in relativity theory, and as a consequence the classical concept of reality, as that what is 'present', cannot be retained. Is reality then the four dimensional manifold of relativity theory? And if so, what is then the meaning of 'change in time'?
Diederik AertsRelated topics
certain change classical clear concept four manifold meaning newtonian present relativity space three understanding view space-timeRelated quotes
The subject of this book is the structure of space-time on length-scales from 10-13cm, the radius of an elementary particle, up to 1028cm, the radius of the universe. ...we base our treatment on Einstein's General Theory of Relativity. This theory leads to two remarkable predictions about the universe: first, that the final fate of massive stars is to collapse behind an event horizon to form a 'black hole' which will contain a singularity; and secondly, that there is a singularity in our past which constitutes, in some sense, a beginning to the universe.
Stephen Hawking
I don't know what to write Feneon about the theory of 'passages'. I will write him what seems to me to be the truth of the matter, that I am at this moment looking for some substitute for the dot [which was the 'heart of [w:Neo-Impressionism|Neo-Impressionist]] painting]; so far I have not found what I want, the actual execution does not seem to me to be rapid enough and does not follow sensation with enough inevitability, but it would be best not to speak of this. The fact is I would be hard put to express my meaning clearly, although I am completely aware of what I lack.
Camille Pissarro
The new vision.... does not proceed from a fixed point. Its viewpoint is everywhere, and not limited to any one position [in space]. Nor is it bound by space or time (in accordance with the theory of relativity) [of Einstein ]. In practice, the viewpoint is in front of the plane... Thus this new vision sees architecture as a multiplicity of planes; again flat. This multiplicity composes itself (in an abstract sense) into a flat image [in contrast to Theo van Doesburg who emphasized the dynamic position of the viewer – a central idea of Futurism in 1919].
Piet Mondrian
Since it cannot be overlooked by the Doctrine of Knowledge that Actual Knowledge does by no means present itself as a Unity, such as is assumed above but as a multiplicity, there is consequently a second task imposed upon it, - that of setting forth the ground of this apparent Multiplicity. It is of course understood that this ground is not to be derived from any outward source, but must be shown to be contained in the essential Nature of Knowledge itself as such; - and that therefore this problem, although apparently two-fold, is yet but one and the same, - namely, to set forth the essential Nature of Knowledge.
Johann Gottlieb Fichte
Secrecy fuels erotic intensity because it makes you feel like you're doing something that is entirely yours. It gives you the sense of autonomy, the sense of freedom, and the sense of sovereignty. And then you add to that the sexual energy. In many affairs, people will tell you they slept with the person three or four times, but the story went on for months. That's an important thing because many people who have affairs often have very good sexual relationships at home. It's not necessarily a compensation story. But affairs offer a different sexuality with a different context.
Esther Perel