Likutei Moharan, Part II 1:8/ליקוטי מוהר"ן·תנינא א׳:ח׳

18. Even if there is no one to prophesy, prophetic inspiration—its mere presence in the world!—frees prayer from exile and redeems it.

2Prayer is really very exalted, but people treat it lightly. Even when they stand up to pray, all they want is to be done with it. As our Sages, of blessed memory, taught: “That which is exalted is degraded by the sons of man” (Psalms 12:9)—this refers to those things that stand at the very summit of the universe, yet people treat them lightly (Berakhot 6b).

3Yet through prophecy, prayer is redeemed from exile, as in “for he is a prophet, and he will pray for you” (Genesis 20:7). Prophecy brings to the perfection of prayer. This is because prayer is the concept of “He creates NiV (the expression) of the lips” (Isaiah 57:19)—i.e., NeVuah (prophecy).