The black horse is the darkened, weighing mind that meters everything out, the third force to ride as the centers open in sequence. Black is the color of matter unlit by spirit, and its rider carries the balances because this is the level where the self rations and calculates its worth in scarcity. Here bread is counted by the penny and nothing is given freely. The scales are the endless inner judging that weighs gain against loss, the merchant-consciousness that turns living into arithmetic and forgets the abundance it already holds.
Black horse: the darkened, calculating mind ruled by matter unlit by spirit
Balances: the inner scales of judging and rationing, the merchant-mind weighing worth in scarcity