Suppose that a universal truth about the natural world can be discovered that requires the examination of such evidence that it seems, foe various reasons to begin with,quite improbable if not impoossible that that such a discovery could be made.
So that a general theory could be developed only if enough natural and experimental evidence is examined together, and an appropriate hypothesis and methods are justified and devised, to describe enough details of a cause from its effects upon matter and energy in addition to the effects of all the forces.
So although, first of all, the experimental findings of quantum physics need to be considered, the theory cannot be sufficiently supported or developed just from any evidence found of matter or the energy it radiates in the world on the smallest scale.
But it is found that a hypothesis of a kind that is quite new to physics can be justified and constructed from the findings described by quantum mechanics as well as other small scale evidence. And only from this quantum hypothesis that represents details of a further cause that can only be described from its effects, is it possible to adequately support a general theory that can be applied to large scale observable evidence of where the cause acts in addition to the causes that have been called forces.
These causes include the fundamental interactions called gravity, electromagnetism and the nuclear weak and strong forces. So that the effects of this additional cause on the small scale are the quantum behaviour called wave, spin and entanglement and, in general, the persistence of the form and organisation of atoms and molecules despite the action of all the forces.
Thus, by acting constantly so as to produce the wave, spin and entanglement of the subatomic components of matter, the cause results in atoms and molecules remaining in their organised forms and so resist the forces acting within and upon them, and even though from the results of many experiments matter has been found to consist almost all of the space between its subatomic component parts.