the alchemists had a completely different view. They thought that the resurrection body was a kind of subtle body which was slowly forming within the material body, or which you could form or become aware of in your own earthly lifetime through meditation.
Von Franz identifies the Diamond Body’s functional equivalent in Western alchemy as the subtle resurrection body formed through meditative practice within the mortal frame — the Eastern immortal body and the Western glorified body as parallel constructs.
, Archetypal Patterns in Fairy Tales, 1997thesis