This might well be one of those
'What ARE you on about Sepher? Almost starting to regret asking the bloody question in the first place now!' type replies but hey, you did ask . . . .
It's a shorter and easier to type variation of Sepher Sephiroth, which is 1) A username I first used on a website devoted to the late 19th / early 20th century Golden Dawn system of magic that offered a free course of study purportedly endorsed by some one or other of the any number of modern-day groups sporting some variant of the Golden Dawn name and claiming to be the true inheritors of the authentic G.D.
'magical current', whatever that's meant to mean, it being derived from 2) the title of the final dull as ditchwater section of a book on Kabbalah by Aleister Crowley, that section being concerned with the numeric values of a shedload of Hebrew words that might be of use to any aspiring magicians out there looking for hidden meanings and coded information in magical texts and sacred books like the Torah / Old Testment, the idea being that for any given word in Hebrew there are any number of other words whose letters add to the same number value and those words are connected in some profound and deep way even if they're seemingly completely unrelated in meaning. For instance, YHVH as God's true name adds up to 26, as do the two words AHBH ( love ) and AChD ( unity ), so the substitution by Gematria is deemed to reveal a couple of your Old Testament God's qualities. Like I said, dull as ditchwater, and hardly a great read! My username maybe made more sense when I had the
Tree Of Life as an avatar, maybe not so much since I put the daft ferret head up.