Musar su Proverbi 18:9

Shlomo further said: "also he who is slack in his work is a brother to the destroyer" (Mishlei 18:9). For even though this person is not a destroyer who commits evil directly with his own hands, don't think he is far removed from being one. On the contrary, he is the destroyer's brother and his comrade.

The fifth quality is laziness. This is an evil quality which nullifies the worship of God. For the lazy man does not complete any of his tasks, and therefore the worship of a lazy person is not complete, for he is too lazy to fulfill all of the conditions of the service to God. And know that laziness comes from folly, and from weakness of the will, and from little knowledge, because the man does not know what benefit will come to him from the worship of God, may He be extolled. Laziness may afflict him because of his lack of envy for the alert ones who occupy themselves with the worship of God. Therefore, every intelligent person should guard himself against this quality and seek ways of removing it from his being. And let him envy his companions who exert themselves day and night in the service of God, may He be extolled. For no one who is not alert in his worship will attain benefit from it. Anyone who is slack in his work will destroy it, as it is said (Proverbs 18:9), “Even one that is slack in his work is brother to him that is destroyer.”

Before beginning a deed: that one not allow a Mitzva to become delayed (lit. Chametz).

Rather when the time of its performance comes, or when it happens to present itself to him, or when the thought of performing it enters his mind, he should hurry and hasten to seize hold of it and perform it, and not allow time to go by in between. For there is no danger like its danger. Since, behold each new second that arises can bring with it a new impediment to the good deed.