Likutei Moharan 14:8/ליקוטי מוהר"ן י״ד:ח׳

18. When a person returns the glory to its source, i.e., to fear, and thus completes that which is lacking in fear, he then merits peace.

2There are two types of peace. There is the peace in one’s bones, for a person must first see to it that he has inner peace. Because, at times, there is no peace, as in (Psalms 38:4), “There is no inner peace because of my sin.” But through the fear, a person merits peace in his bones. As is brought in the Zohar (II, 79a): In the place where there is fear, there you will find wholeness, as in (Psalms 34:10), “For those who fear Him lack nothing.”

3<And> when a person has inner peace, he is then able to pray. For the essence of [praising God in] prayer is achieved through fear, corresponding to (Proverbs 31:30), “A woman who fears God, she shall be praised.” This is because prayer is in place of the KoRBan (sacrifice), and of the sacrifice it is written (Leviticus 21:18), “Any man who is blemished shall not yiKRaV (draw close).” But when he is not blemished—that is, “In a place where there is fear”—he can then draw close to perform a complete service.

4And this is what is written of Chanah (1 Samuel 1:13), “Now, Chanah was speaking to her heart”—<i.e.,> through fear she merited to prayer, for the essence of fear is in the heart.

5And through prayer, a person merits universal peace—i.e., perfection of the worlds. This is the reason why prayer is called a KoRBan, by virtue of its bringing the worlds KeiRuV (closer) to their perfection.