"And when one sees the good things  that he receives from G-d, he will surely be awakened to  Zealousness in His service, as I have written above, how much more so if he  considers the fact that all of his good  depends upon G-d and that his needs and necessities  comes from Him, and from no other, in which case he will certainly  not be lax in his Divine service, in order not to lack what  is essential to him." 