The tendency towards “black magic”

[Sacred Fool]

Far better, I think, to love the self, the full 360-degree self, the light and the dark, that which is liked and disliked in the self, and to then do the work of the disciplines of the personality: Knowing the Self, Accepting the Self, Becoming the Creator.

Agreed.  But the Theosophists weren't much in to love.  "There is no religion higher than truth" was one of their slogans, and they were not particularly loving to their anointed saviour, J. Krishnamurti, when he tired of the situation they put him into.

They were seeking assiduously to see behind the veil in Victorian times, so one has to give them credit working under duress, but various distortions of those years are woven into their works.  The unbalanced anti-sexual display in the OP is one example of that, I would aver.