Definition of "theosophist"

What can it be but the heaving of the Hypochondria that lifts up the Mind to such high comparisons from a supposition so false and foolish? But I have observed generally of Chymists[sic] and Theosophists, as of feveral other men more palpably mad, that their thoughts are carried much to Astrology, it being a fancifull study built upon very slight grounds, and indeed I do not queftion, but a relique of the ancient superstition and Idolatry amongst the rude Heathens, which either their own Melancholy, or something worse, instructed them in.

1662, Henry More, “A brief discourse of the nature, causes, kinds, and cure of enthusiasm”, in A collection of several philosophical writings, 2nd edition, London: Flesher, page 30, or, § xliv