[qwerty456127]

> who are agnostic or atheist and can't lean on concepts like "The Buddha" or "Lord Shiva" (although I myself am Hindu.)

Whoever can accept the Gödel's incompleteness theorems and still use math, doesn't mind games, simulations and usage of different dimensionalities and topologies, also can practice both visual and sensory imagination - is perfectly capable of believing in Buddha, Shiva, whoever and whatever for the duration of the exercise if they chose to. Blieving in a diety with certain characteristics, an embodiment of certain archetypes/feelings/intentions during the practice can do night-and-day difference in efficiency and precision of intentional nervous system regulation.