As Roderick notes, numerology can also be used to boost magic work. He suggests that we distill the purpose of our spell to a single word, something like ‘love,’ ‘success,’ ‘understanding,’ and so on. Then you analyze the numeric value of that word. Love, for example, would be 3+6+4+5, which is 18 or 9.
Roderick then suggests we consult a table such as the one he provides below and use some of the correspondences listed for that number in the spell:
I have to admit, though, that I have no idea where Roderick got these particular correspondences from…and I have to admit that I don’t see a ritual that invokes Ereshkegal as the Goddess and Shiva as the God working out very well.
If I was to use numerology in my spell workings, I’d figure out the number for the core word and use that number somehow. For example, with the love spell, I might choose to use 9 pink candles or repeat a chant 9 times or reinforce the spell every day for 9 consecutive days. That seems like a far more concrete way to link numerology with spellcraft to me.