Likutei Moharan 75:4/ליקוטי מוהר"ן ע״ה:ד׳

14. This aspect [of refining the sparks] happens every day until the coming of Mashiach, until “And on that day His feet shall stand upon the Mount of Olives,” which is the aspect of the feet. Torah and prayer are, likewise, the aspect of standing. Torah—as it is written, “But as for you, stand here by Me;” “and they stood at the foot of the mountain.” Prayer—“Pinchas stood and prayed.” This is the aspect of the feet. The feet of Torah and prayer bring closer the aspect of “And… His feet shall stand upon the Mount of Olives,” as it is written, “Righteousness will go before Him.” “Righteousness” refers to Torah and prayer, as it is written, “you ought to be speaking righteousness.”

2This is the explanation of: What a child says in the ShuK (marketplace) [expresses the views] of his father or mother. This is because the words of Torah and prayer create the aspect of the ShoKin (thighs) and feet.

3“By the word of God the heavens were made.” Therefore, there are holy sparks that fell into all things, into food, drink and clothing. The sparks are the pleasure derived from the food or drink.

4The sparks are also letters. Before one expresses [them] in speech, they are the aspect of blood, which corresponds to the soul, as it is written, “For the soul of any living being—its blood is one with its soul.” When it is expressed as speech, it is the aspect of “my soul came forth when he spoke.”

5Beforehand, it is the aspect of “TZoLeA (limping) on his hip.” Then, when expressed as speech, they are the aspect of “[The Lord God] built the TZeLA (rib).” Because these sparks, before being spoken, are lacking combination, they are the aspect of shards and contention, with each spark rising up against the other. But when he expresses them as words, they are combined and are the aspect of peace. We see from this that one has to employ the aforementioned sparks for speaking words of Torah and prayer and not for anything else.

6This is the explanation of the Talmudic teaching: Levi spoke accusingly of Heaven and became lame. This corresponds to “limping on his hip”—on account of his expressing the sparks as something else he remains in the aspect of “limping on his hip.”