Musar su Ecclesiaste 10:4

It was the Levites' task to stand guard outside the tabernacle, whereas the guard duty inside the precincts of the tabernacle was performed by the priests. The reason that a זר, non-priest or Levite, was not allowed to perform service in the Tabernacle was simply that the "cause" must not be confused with the "effect," since it is not his assigned place. Conversely, a priest must not perform his duties outside the Tabernacle, since that too is not the place assigned to him, and it would not befit his position in the scheme of things, i.e. לא לפי כבודו. The definition of what is חוץ למקומו, outside one's assigned place, is twofold. One is that one must not physically step outside the area assigned to one to perform one's duties. The other is that one must not enter the Holy of Holies, i.e. enter the inner sanctum. This is the meaning of Kohelet 10,4: "do not leave your place."

And thus, precisely, is it in our instance. The yetzer bested you today in the area of forbidden speech. Stand up and strengthen yourself against him tomorrow to defeat him. And even if, G-d forbid, he bests you again, notwithstanding this, return and strengthen yourself again against him to wage war with him. And the Holy One Blessed be He will certainly help you, too, to emerge victorious; for "one who comes to purify himself is abetted (from on High.") In sum: A man should spend all of his days warring with his yetzer, this being the intent of Chazal in "Let one always incite, etc." And this, in effect, is the intent of the verse (Koheleth 10:4): "If the spirit of the "ruler" rises up against you, do not abandon your position."