Likutei Moharan 78:6/ליקוטי מוהר"ן ע״ח:ו׳

16. This is the meaning of [the opening verse]: {“May He grant power l’malko (to His king), and raise the horn of meshicho (His anointed one).”}

2“May He grant power l'MaLKo”—i.e., when he provides the attribute of MaLKhut with power and illumination, then he “raises the horn of MeShICho.” <This is the connotation of “He MaSIaCh (generates speech in) the mute” (Shabbat Morning Liturgy)—i.e., that each person has to rectify his personal aspect of speech.> One should very gradually ascend from level to level, until the illumination of the Divine persona Malkhut <is rectified> entirely—this being the aspect of <speech>, as explained above.