Someone who trusts in H'shem knows that if he were to lose his livelihood H'shem will provide for him by other means. He does not give up or give in, he continues to pursue other means all the while knowing H'shem is taking care of him.
449/451
Nefesh Hachaim
The nonbelievers, those who have contempt for Torah Scholars, and ridicule and denounce someone for learning Torah Lo L'ishma it says of them "they will forever burn in Gehinnom." This is because their actions cause one to be discouraged from learning Torah and reaching their potential of becoming a Talmid Chochom
Prologue to Gater Four, Chapter 3 pg 123