Doubt goes out to deceive the whole lower mind and muster it for war against the higher self. The 4 quarters are the 4 natures of a person centered on the self, the emotional, the spiritual, the physical, and the intellectual, and to deceive the nations in those quarters is for doubt to invade all 4 and turn them against the awakened center. Gog and Magog are the massed material mind, the sheer weight of earthbound thinking rallied to overwhelm what has begun to rise. Their number like the sand of the sea is the endlessness of such thoughts, uncountable grains at the edge of the emotional deep, always more where the last came from. This is what a person faces when the material mind gathers in full against the higher life waking inside.
4 quarters of the earth: the 4 natures of a person centered on the self, the emotional, spiritual, physical, and intellectual
Gog and Magog: the massed material mind, the weight of earthbound thinking rallied against the higher self
Sand of the sea: the endlessness of the lower thoughts, uncountable grains heaped at the edge of the emotional deep