Likutei Halakhot, Orach Chaim, Laws of Morning Hand Washing 4:1/ליקוטי הלכות·אורח חיים·הלכות נטילת ידים שחרית ד׳:א׳

11. Based on the lesson, "And Boaz said to Ruth", Likutei Moharan I, 65. See the entire lesson well. The basic rule is that a person must at all times look upon the purpose as being totally good, totally one. For there, one nullifies all the pains and all the troubles in the world, for everything is for the good. However it is impossible to look upon this purpose except with דְּעֵינִין מֵחֵיזוּ דְּהָאי עָלְמָא לְגַמְרֵי, etc. And therefore the soul of a person is sunken when he has great pains, G-d forbid. He seals and shuts his eyes with great strength, etc. in order to chase away the purpose, etc. See there all of this very well. However, after one moves away from the nullification, one's pains and troubles come back stronger than at first. (This is like) two people fighting with each other, when one sees, etc. But afterwards the pains and troubles are cooled and nullified through the Torah which is draw down via the tribulations, via nullification of the purpose. Through this the sunrise of the residue [the trace of revelation left after the First Tzimtzum - the initial concealment of G-d's infinite light] is illuminated in the mentalities and one receives Torah with happiness. This is a vessel for the receiving of Torah. Through this the thirst of the soul is quenched, which is the aspect of tribulations, in the aspect of (Isaiah 55:1) "Ho! All who thirst, go to water", etc. See all of this brought well over there. And then one is able to pray as is fitting and to unite each prayer, etc etc. See very well over there.