A very well known writer once witnessed a black mass. The “priest” was conjuring up the devil. Although he was a proponent of “white magic” and owned over 2,000 books on witchcraft, he was frightened out of his wits by the display. He knew that the “priest” was a lunatic but he couldn’t get over the feeling that the devil was about to appear. I believe the “mass” ended up being called off.
For non-believers and sceptics, I know this is hard to imagine. There are just some things beyond our ken...
I have seen and experienced enough in my own walk to know the reality of things - I have read enough of other people’s experiences and known a few who used to be into witchcraft and heard their conversion stories. There is no doubt in mind as to the veracity of their testimonies but even moreso to the length of God’s arm to drag people up out of the depths!