This is incredibly pedantic. (Also rather unjustified, due to my own lack of knowledge regarding occult enthusiasts.) However:

It's interesting that demons in computer science are called that way. They have exactly the same functionality as the demons that occult enthusiasts proclaim to use.

Although daemons in computer science are rather akin to daemons in classical mythology (sort of, kind of, close enough), they really don't particularly resemble our modern conception of demons. I mean, they can totally get a programmer into "Sorcerer's Apprentice"-style shenanigans, but I've never heard of a daemon tempting anyone.

You can always say: "Well, it's just my mind doing something strange." At the same time it's a hard confrontation.

I have previously recommend to friends that alcohol is a moderately good way to develop empathy for those less intelligent than oneself. (That is, it is a good way for those who really cannot comprehend the way other people get confused by certain ideas). I wager that there are a wide array of methods to gain knowledge of some of the stranger confusions the human mind is a capable of. Ignoring chemical means, sleep deprivation is probably the simplest.

Also, congratulations for going through these experiences and retaining (what I assume is) a coherent and rational belief-system. A lot of people would not.