Musar su Salmi 119:161

On this fear Moshe Rabeinu, peace be unto him, said: "in order that His fear shall be upon your faces, so that you shall not sin" (Shmot 20:17). For this is the primary fear - that a man fear and tremble always until this fear never leaves Him. For through this, certainly, he will not come to sin, and if he does come to sin, it will be considered as accidental. Isaiah said in his prophecy: "this is the one to whom I will look: he who is humble and contrite in spirit and trembles at my word" (Isaiah 66:2). And king David extolled in this: "Princes have pursued me for nothing, but my heart feared [only] Your word" (Tehilim 119:161).

This is what our sages said: "Know what is above you: an eye that sees, an ear that hears, and all your deeds are inscribed in a book" (Avot 2:1). For since the Holy One, blessed be He, watches over every thing, and He sees everything and hears everything, certainly every action will leave an impression. And all of them are inscribed in a book, whether for merit or for debt (punishment).