Evil is not the Opposite of Good, it's the Opposite of Truth

[UltraBudgie]

This is pointless, as such definition will always be localised to the perceiver as an individual

Are we not often catching ourselves using the same term for a different thing, or using two terms for the same thing?

Thank you that is insightful.

That though there may very well be a "truth" within that which you believe, this does not make your beliefs themselves "truth"

This is where perhaps capital letters would help, "truth" vs "Truth". With Truth indeed being as you describe, eternally applicable and irrefutable, objective and incontrovertible. A thing that cannot exist in this world, where all attempts to cast the subjective or even the empirical as "Truth" become, at best, widely-held "truth", and at worst, distorted reflections.

And perhaps the same to Evil, the absence of Truth. In this world, the evils we experience are as you describe: some perhaps widely-held to be "evil", but in no demonstrable absolute sense, composed in perceptual and describable manifestation as pains and suffering. There does indeed appear to be irremovable subjectivity.

As science attempts to close the gap between the understanding of "truth" and "Truth", so ponerology attempts to close the gap between the understanding of "evil" and "Evil". That neither may ever succeed does not make them useless, however. Nor does that eternal insufficiency disprove any transcendent.

Within the many years that I was attacked and tortured by entities and things darker than most could imagine, I never once encountered anything that I would call real "evil"

There we are then. I accept your testimony.

A light so beautiful, who loved this world so much, it was willing to let everyone hate them unfairly, and take all the pain of this world, just so that people can believe in something beautiful

Even your description is beautiful.

Difficult deliberations

These are concepts that are hard, if not impossible to put into words, let alone understand unless you have experienced them yourself

QFT