OU TORAH Va’eirah Rav Moshe Twersky, HY"D

By the man, the Torah says lo yadun avosecha. Rabbeinu Bachaya says that this can be referring to the Avos. The Avos were not zocheh to the madreigah of nisim gluyim u’mefursamim. The reason for this is as the pasuk says in the beginning of the parsha that the hasagah of the Avos was through the sheim of Keil Shakay, and not through the sheim Havayah. Rashi says that ani Hashem means that Hashem is ne’eman. Hashem is the ultimate of reliability. The Avos didn’t get to see the fruition of that reliability. Paranthetically, we see from here that having emunah means to rely on Ha’Kadosh Baruch Hu.