Machshava:

Ethics 

Collections: Rabbi Weinberger: Tanya

Description

P. 275 in the commentary (7th perek). The body will function according to how the person wants it to function - either serving kedusha (holiness) or tumah (impurity). If a person gives in to the klipos, then the body becomes a merkava in the hands of the klipos, not the neshama. When a taiva (lust) is driving you car, you are out of control. There is a difference between eating in order to sustain the body versus eating for taiva. When returning to avodas Hashem after eating without kavana (proper intention), the food is raised back up to kedusha from its previous fallen state. Since the life force of food is from the kilpah nogah, it can be easily drawn wherever you take it.