Is it harmonic? Not sure. Is it a convergence? Doubtful. It is definitely another shift, though.
A couple months ago I got my hands on a copy of The True Grimoire, compiled/facilitated by Jake Stratton-Kent. And it was way over my head.
Suddenly, it makes sense. I managed to burn through half of it the past few days.
Here's a catalyst for it making sense, which is surprising... I read an interesting piece in the British Journal of Thelema (the one Harry's published in currently), and it was a commentary on how a great deal of Hoodoo-type magic, whether it is practiced in Santeria, or Vodoun, or just root work, draws on 'Solomonic magick'. A couple of pieces simply slid together and clicked into place, and suddenly the grimoiric writings made more sense. And there's a greater point to all of it, as well...
The early alchemists belonged to a great many religious traditions. Alchemical study and practice is not at all connected with religion, or religious belief of any particular stripe, but it depends greatly on the practicitioner belong to A religious tradition. One has to have a religious life in order to be an alchemist. One has to believe in greater forces or a greater force or spirit, because that is what grounds the practicitioner and fuels the practitioner.
One of my highschool chums was fond of quipping that Haiti is 75% Catholic and 150% Voodoo. Well, in a way that makes sense. You have to believe in the saints in order for the orishas to have their place in day-to-day practice, after all. One has to have religious belief to sustain them, but Vodoun itself is not necessarily the religion.
As well, with traditional witchcraft, as that is gradually fleshed out and reimagined (and I am not at all convinced that the reconstructionists have much idea about it, but that's my jag to work out...), witches were practicing Christians. It wasn't just syncretism. And it wasn't just survival. You know, try being a witch in a society where it is punishable to not attend church, and see where that gets you - insofar as survival goes.
I definitely think that early Christianity as practiced in the British Isles, for example, was vibrantly colored by pagan myth and legend and thinking. That's clear. The witchcraft was just that, craft and crafting. It was a way of life irrespective of religious life or thought. BUT, when Christianity took hold and became the religion of the land... the newly-minted practitioners seized up on imagery and saints (because they were familiar - consider how many saints and martyrs of Celtic Britain were actually characters of mythology) and started using those in magic because they were new and sort of different but sort of familiar, and maybe they were more powerful. (Anyway, I was setting out to make a different point and had better get around to that.)
Practice of magick (whether you put the 'k' on there or not) and of ritual and sorcery, et al, requires religious belief, but is not the religion itself. This is philosophical practice. It is when we get into the neopagan folkways of Wicca and Feri and such that we get into religion. Goddess the Mom instead of God the Father, for example.
This post has been brought to you by the letters, 'O', 'B', 'V', 'I', 'O', 'U', and 'S'.
(Sometimes it worries me, how long it takes me to realize these things and actually assimilate and apply them.)