The alchemists had an excellent image for the transformation
of suffering and symptom into a value of the soul.
A goal of the alchemical process was the pearl of great price.
The pearl starts off as a bit of grit, a neurotic symptom or
complaint, a bothersome irritant in one's secret inside flesh,
which no defensive shell can protect oneself from.This is
coated over, worked at day in day out, until the grit one
day is a pearl.
(from 'A Blue Fire' by James Hillman)