Musar על איוב 31:7

Even Job testified on himself: "if my step has turned aside from the path and my heart has gone after my eyes, and if any speck has stuck to my palms" (Job 31:7). Consider this beautiful analogy in which he compared unseen theft to something which tends to stick to a person's hand (ex. flour when kneading) for even though one does not intend to go and take it and by itself it sticks to his hands, nevertheless, it remains in his hands. So too here, even though one does not go out to actually steal, it is difficult for his hands to be completely empty of theft.

Also, since one is prone to forgetfulness in these fine details, he will need diligent study in the books explaining these fine details to renew remembrance of them in his mind. Then certainly, he will be roused to fulfill them.

However, the factors which cause loss of this trait are all those detriments to the trait of Watchfulness, in addition to lack of proficiency in knowledge of the laws and ethics (Mussarim) as I wrote above. Our sages already stated: "an ignorant man cannot be pious" (Avot 2:5). For one who does not know cannot possibly do. Likewise they taught "great is study in that it brings one to doing" (Kidushin 40b).