theosophy

They have their own traditions of art and science. They do not […] discuss God or metaphysics or men. […] All their wisdom and theosophy, and all their grasp of beauty, truth or love, is in the singing. […] They look unloving enough, and so they are. Pitiless fallen angels.

The religious ideas of late Renaissance alchemists were based on the Paracelsian theosophical system, which was a half-pagan, half-Christian belief system, both a mystical path and a theurgic practice.