Musar su Proverbi 2:6

For sin dulls a man's heart, causing to depart from him true knowledge and the spirit of wisdom which the Holy One, blessed be He, bestows to the pious, as written "for G-d grants wisdom" (Mishlei 2:6). Thus he is left animal-like and material, sunk in the coarseness of this world.

These things can only be evaluated by one of understanding heart and sound intellect since it is impossible to clarify all their endless details, and "G-d gives wisdom; from His mouth comes knowledge and understanding" (Mishlei 2:6).

However, that which can protect a person and save him from these detriments is trust in G-d. Namely, that a person casts his burden entirely upon G-d, knowing that it is certainly impossible for a man to lack what was designated for him, as our sages taught: "all of a person's sustenance [for the year] is fixed for him from Rosh Hashana [to Yom Kippur]" (Beitzah 16a). Likewise, they said: "no man can touch what was prepared for his fellow even to the extent of a hair's breadth" (Yomah 38b).

This is like a tax imposed on the human race which one cannot escape from paying. Therefore, our sages, of blessed memory, said (Sifri 15:18): "I might think one can sit idle, but scripture says (Devarim 28:20): 'in all that you set your hand to do' ".

But I spoke a bit on each of the particulars of the Beraitha which I based this book on. This may serve as a start and beginning to expand study in these matters. For their ways have been revealed and their paths opened to our eyes so that we may walk in them on the straight path. On such matters it is written: "Let the wise man hear and increase learning. The understanding man shall acquire wise counsels" (Mishlei 1:5), and "if one comes to purify himself, he is helped" (Shabbat 104a), and "for the L-rd gives wisdom; from His mouth comes knowledge and understanding" (Mishlei 2:6), so that every man may straighten his ways before his Creator.