The section Chovot HaLevavot from Sha’ar HaBitachon is like “the Gemara on emunah and Bitachon“.
Studying and internalizing its lessons leads one “…to have the life that G-d meant for us to have, a life that is not filled with worry, not filled with anxiety…not following what seems to be with our eyes and being beholden to people and what seems to be going on in the world…”
This study will allow a change in attitude towards life, increase one’s trust in Hashem “…as he realize[s] that the events of [one’s] life are ultimately controlled only by Hashem, therefore [one has] little to worry about.”