Even a “lowly” human being is sustained and animated by a life
force that courses through his entire body extending its reach to
include the seemingly insignificant toenails as well.
Despite this, there is without a doubt a vast distinction between the life force animating the brain and that which energizes the hands and feet, for example.
This distinction is not merely quantitative, but is of an immeasurably qualitative nature.
Rabbi Adin Steinsaltz