Those that trust in H'shem have no need to go into “wearying occupations, and..
professions that exhaust the body" They can also avoid jobs that
would require them to test their morals and oppress others.
pg 363
Upon completion of a Mitzvah the "celestial light"
that accompanied him goes back to "its source". This good deed now built and aroused the
higher worlds. When he goes up to Gan
Eden he will enjoy these higher worlds that his good deeds created. This is
the understanding of “reward in the World to Come”.
pg 363
Nefesh Hachaim
Gate One Chapter 12 pg 49
