"Sustenance is in His power and under His control" One should NEVER think that his support comes from his employment or guarantors rather only from the hand of H'shem, in anyway and at any time that He sees fit. No one can help or harm him other than H'shem who promised to support man.
pg 405
Nefesh Hachaim
Rambam teaches that the universe is "one being" All the different parts are the equivalent to the different limbs and organs of a human being and it's source is GD, at it states: He is "the life of the universe."
Gate 2 Chapter 5 pg 83
