Rabeinu explains that the tzadik’s words of Torah/Prayer are the aspect of the Land of Israel whereas the words of the Tzadik’s mundane conversations are the aspect of the inferior part of the Land of Israel.

He teaches us that the tzadik’s mundane conversations are intended to bring those people who are far from the Truth of the Torah up to Da’at/knowledge. In speaking words of mundane conversation which has the Torah enclothed in it, the tzadik is able to elevate people like us to the holy Da’at, represented by the Holy temple.