Chasidut על סוטה 8:11

“…lest your heart grow haughty and you forget the LORD your God…” (Devarim 8:14) They said in the gemara (Sotah 5a) This is a warning to the proud in spirit, as it is written ‘lest your heart grow haughty and you forget.’ The Rav Moshe m’Kotzi counted this as a negative commandment and wrote that God revealed to him in a dream, that the essential warning of all the Torah is the commandment to remember and that forgetting, which is its opposite, God forbid destroys the whole Torah. And the Holy Ba’al Shem Tov explained - when the blood is clouded, then one is in the aspect of the ‘back end’ which has the numeric value of ‘and you forget’ because memory flows from the names of zachor and forgetting from the ‘back end’ of Aba and Ima which is the numeric value of ‘and you forget’ as is written in the Yichudim (Sha'ar Ruach ha-kodesh, tikun 26 (daf 17, column 3)). As it is with an individual, so it is with humanity – exile flows from forgetting and redemption from remembering. “The words of a wise man’s mouth find favor…” (Kohelet 10:12)