Likutey Moharan Volume 1/B, #11:2, Rebbe Nachman of Breslov, Jerusalem/New York,1989
"And Elihu the son of Barakh'el the Buzite answered and said, I am young, and you are very old; therefore I was afraid, and durst not declare my opinion to you. I said, Days should speak, and multitude of years should teach wisdom. But there is a spirit in man: and the breath of the Almighty gives them understanding. The old are not always wise: nor do the aged understand judgment."
"The God of Hosts is the king of glory, evermore."
"Of the ten sefirot, Malkhut is likened to the mouth, the power of speech (Tikkuney Zohar, Introduction). This is so because the mouth--speech--gives vent to one's inner feelings, much as the function of Malkhut is to "reveal" by being the channel through which the hidden influences of the upper sefirot are brought out into the world. The Mai HaNachal adds that it is therefore one's speech which will reveal whether one accepts God's Malkhut (kingdom). When he does, his mouth actually becomes a holy mouth--a mouth suitable of holiness, Torah and prayer."
Likutey Moharan Volume 1/B, #11:2, Rebbe Nachman of Breslov, Jerusalem/New York,1989, annotation by Chaim Kramer.
The 10th sefirah, Malkhut, is the final level and fullest extension of the Word of God. It is Kingdom in the physical sense. As such it is the mouth through which God's Word is enunciated.
The extensible world is God's glory. It is our history; it is God's discourse--His speaking. The world as we experience it is God's speech and the world is that through which God speaks--it is his mouth--and it is his speaking, too.