synonymous in the unconscious with the Mills of God that grind slowly but most justly.
we carry all or our deeds (in symbols) into the mill to reap the benefit and therefore the mill is a positive sign for good people, but a threat for evil people that their selfish deeds will be paid back.
based on the quality of his past acts, a person takes away from the mill hope (e.g. white flour) or pain and fear (e.g. sand).
not functional, demolished: the time for repayment has not yet arrived, the final account has not yet been issued.