Blavatsky
The processes of natural development which we are now considering once elucidate and discredit the fashion of speculating on the attributes of two, three, and four or more dimensional space; but, in passing, it is worth while to point out the real significance of the sound, but incomplete, intuition that has prompted -- among Spiritualists and Theosophists, and several great men of Science, for the matter of that -- the use of the modern expression, the "fourth dimension of space."
To begin with, the superficial absurdity of assuming that Space itself is measurable in any direction is of little consequence. [...] The three dimensions belong really to only one attribute, or characteristic, of matter -- extension; and popular common sense justly rebels against the idea that, under any condition of things, there can be more than three of such dimensions as length, breadth and thickness. These terms, and the term "dimension" itself, all belong to one plane of thought, to one stage of evolution, to one characteristic of matter. So long as there are foot-rules within the resources of cosmos, to apply to matter, so long will they be able to measure it three ways and no more; just as, from the time the idea of measurement first occupied a place in the human understanding, it has been possible to apply measurement in three directions and no more. [Source: SD:I:271,272 (The four Dimensions of Space)]
Einstein
In physics, spacetime is any mathematical model that fuses the three dimensions of space and the one dimension of time into a single four-dimensional continuum.
[...] However, in 1905, Albert Einstein based his seminal work on special relativity on two postulates: (1) The laws of physics are invariant (i.e., identical) in all inertial systems (i.e., non-accelerating frames of reference); (2) The speed of light in a vacuum is the same for all observers, regardless of the motion of the light source. The logical consequence of taking these postulates together is the inseparable joining together of the four dimensions, hitherto assumed as independent, of space and time. [Source: https://en.wikipedia.org/wiki/Spacetime]
General relativity (GR, also known as the general theory of relativity or GTR) is the geometric theory of gravitation published by Albert Einstein in 1915 and the current description of gravitation in modern physics. General relativity generalizes special relativity and refines Newton's law of universal gravitation, providing a unified description of gravity as a geometric property of space and time, or spacetime. [Source: https://en.wikipedia.org/wiki/General_relativity]
& beyond
By the 1920s, the physics community understood and accepted special relativity. It rapidly became a significant and necessary tool for theorists and experimentalists in the new fields of atomic physics, nuclear physics, and quantum mechanics. [Source: https://en.wikipedia.org/wiki/Theory_of_relativity]
In spite of the fact that the universe is well described by four-dimensional spacetime, there are several reasons why physicists consider theories in other dimensions [...] In bosonic string theory, spacetime is 26-dimensional, while in superstring theory it is 10-dimensional, and in M-theory it is 11-dimensional. [Source: https://en.wikipedia.org/wiki/String_theory#Extra_dimensions]
So the reasonable alternative (the conclusions of Einsteins theories are too often unlogical and therefore impossible) for a scientific Kosmogenesis that supports Theosophy and vice versa, is the Eletric Universe or Plasmacosmology.
What do you think?