It is a urban legend, but it is true. The universe does not generate light, it pulls it from the outside, the core of these leakings turns into plasma, forming the stars. The stars expels plasma, which turns into dust and liquid, thus generating the planets. The reactions inside the stars which generates heat are a consequence of the light leaking from the omniverse to the universe.
This all comes through the membrane, which has these entrail-like visuals when saw through quantum glasses. The membrane is viscous and it moves in more than three spatial dimensions, which might causes nausea to those who see it.
The universe pulls light from the liminal in order to turn it into matter, the entropy then sends information to the causal. The causal turns the information into lumen (information without meaning) and numen (information with meaning). The lumen is sent to the liminal, where it becomes light again, which is then pulled by the universe to form more matter. The numen is kept in the causal, causing the realm of forms.
The more numen one's accumulate in life, the more deja vus he have. The deja vu causes one's soul to travel through the membrane, to other universes where he didn't exist previously, being then able to reload a earlier save. This is the only valid form of reincarnation (that preserves one's ego).