tzedaka as the root of emunah

Not much time to write today, but a quick mareh makom that is worth thinking about -
V’He’emin b’Hashem, VaYachsiveha lo tzedaka (15:6) – Avraham believed in G-d, and he considered it an act of charity. Who considered what an act of charity? Based on the context of the parsha, which discusses the promise of Eretz Yisrael to Avraham, Rashi explains that G-d considered Avraham’s belief in the promise without asking for proof an act of tzedaka. Ramban disagrees and says that Avraham’s belief without proof was not extra meritorious considering that Avraham was a prophet; rather, the pasuk means that Avraham considered G-d’s promise to give him the Land of Israel an act of tzedaka, charity, that exceeded his merit.
Says the Maggid m’Koznitz:
V’He’emin BaHashem – Avraham believed in G-d;
VaYachshiveha Lo Tzedaka – And he considered this belief, which we think resulted from pondering nature or burning birahs, not a result of intelligence, persistence, insight, his value system, culture, etc., but simply a result of G-d’s tzedaka. There is no a priori reason to think that a finite human being could ever have any intelligence of an invisible, incomprehensible, all powerful being. G-d's perhaps greatest charity is creating us with the ability to believe in Him.
Short vort, but a powerful idea - maybe more on it another time. Good Shabbos!