Musar su Salmi 16:8

The authors of the ethical literature write of a wonderful strategy for avoiding this sin: Let a man envision to himself continually that Hashem’s four-letter name is written before him in black ink upon parchment, in keeping with the verse, “I have placed Hashem (i.e., the four-letter name) before me continually” (Tehillim 16:8). This is the principle that King David alludes to in the verse, “My eyes are always directed towards Hashem, for He will free my feet from the net” (ibid. 25:15). The meaning should be obvious.

If an outstanding Torah giant such as Moses saw fit to seek elucidation from G–d concerning any doubts he entertained, how much more must we learn how important it is for us – who do not compare to Moses in the slightest degree – to constantly review the text we study in order to be certain that we have not misunderstood any of it. Moses, of course, exhorted the people to be sure to have the right intentions when studying Torah, as we know from 4,39: "Know therefore this day and keep in mind that the Lord alone is G–d in heaven above and on earth below; there is no other."

If a person borrows money or household utensils from a friend, he must remember exactly what he has borrowed and take care to return everything. One who has many business interests and is very busy should be very careful not to borrow money or things from people, since he is liable to forget everything and not remember. If someone has done him a good deed he should make a point of remembering it so that he can reciprocate. Concerning charity, one must remember the poor and constantly keep their distress in mind, and thus he will be able to help them. And if a man comes to give testimony in a court of law concerning what he has seen and what he knows, he must be very careful to remember and he must not diminish from or add to that which he saw. See how the Holy One, Blessed be He, has warned us concerning memory. As it is said, "Beware lest thou forget the Lord thy God, in not keeping His commandments and His ordinances" (Deut. 5:11). And it is very important to remember God in all of one's deeds. And thus did David say, "I have set the Lord always before me" (Ps. 16:8).