>“I’ve heard that there are colors that are too bright for our eyes to see,”
I don't know about brightness, but psychedelic drugs routinely cause visuals of colors that are too saturated for the eyes to see. This is because the responsivity spectra of the eye's cone cells have a lot of overlap, especially between the red and the green types. See: https://commons.wikimedia.org/wiki/File:Cones_SMJ2_E.svg
Psychedelic drugs affect the nervous system directly, so they can trigger one color channel without triggering the others. Presumably religious experiences can do the same thing.
You can approximate this effect without drugs by tiring out the overlapping channels before viewing the one you're interested in. Fill your screen with pure cyan (#00FFFF), and set up another tab full of pure red (#FF0000). Turn your display brightness up and switch off the room lights. Stare at the cyan screen for several minutes, and then immediately switch to the red screen. I suspect this color is close to what Dick and West saw.
I think this sort of "divine light" experience happens to a lot of people. In the Burmese school of Buddhism started by Mahasi Sayadaw, there is a stage of insight called the "Arising and Passing Away" that teachers identify when their students report phenomena like this. If you go to a Buddhist internet community like dharmaoverground.org, you will find a lot of people reporting and discussing this sort of thing.
Although I no longer consider myself Buddhist, I don't know what to make of it.
I don't know about brightness, but psychedelic drugs routinely cause visuals of colors that are too saturated for the eyes to see. This is because the responsivity spectra of the eye's cone cells have a lot of overlap, especially between the red and the green types. See: https://commons.wikimedia.org/wiki/File:Cones_SMJ2_E.svg
Psychedelic drugs affect the nervous system directly, so they can trigger one color channel without triggering the others. Presumably religious experiences can do the same thing.
You can approximate this effect without drugs by tiring out the overlapping channels before viewing the one you're interested in. Fill your screen with pure cyan (#00FFFF), and set up another tab full of pure red (#FF0000). Turn your display brightness up and switch off the room lights. Stare at the cyan screen for several minutes, and then immediately switch to the red screen. I suspect this color is close to what Dick and West saw.