Through Emunah, Everything is Transformed for the Better:
The Kobriner Rebbe zy”a quotes Rav Shlomo of Karlin zy”a as explaining the pasuk in Tehillim of “trust in Hashem and make good; dwell in the land and be nourished by emunah” to mean that one should trust in Hashem and “make good” by recognizing that everything He does is good. In others words, one should always say “gam zu l’tova” no matter what occurs. If one does this, he can “dwell in the land and be nourished by emunah.”
Even if he is lowly and down “in the land”, if he has emunah and trusts that everything Hashem does is good, he will be nourished and everything will truly be transformed into good.