The principal nature of mind is doubt, whether one is doing right or wrong. And doubt and faith are enemies. While faith leads to the destination, doubt pulls back. When the mind was so pulled back, attracted by all the impressions of earthly life, it could neither take hold of the earth nor journey with the spirit, and remained, neither earth nor water, but salt. The only two bodies which are close to the soul followed the soul. Naturally they would follow, for they are closely related to the soul, Vignanamayakosh, the body of Wisdom, and Anandamayakosh, the body of Joy.