Likutei Moharan 11:3/ליקוטי מוהר"ן י״א:ג׳

13. KaVoD (glory) is only complete when it has the letter vav drawn into it. Without the vav he remains “K’VaD (heavy) of tongue” (Exodus 4:10). But with the vav he is in the aspect of (Psalms 30:13), “… kavOd, and not remain silent.”

2This is because wherever the letter vav is used, it comes to add (Pesachim 5a). In other words, there is an addition of holiness: guarding the brit (the Covenant). As our Sages taught: Wherever you find protective measures against immorality, there you will find holiness (Vayikra Rabbah 24:6). For one is contingent upon the other, haughtiness and immorality, as our Sages said of the verse (Proverbs 6:26), “The adulteress traps the haughty soul” (Sotah 4b).

3This is why the brit is referred to by the Holy Name Shadai, as is written (Genesis 35:11), “I am the Omnipotent Shadai ; be fruitful and multiply.” For ShaDaI indicates “that yeSh DaI (there is enough) of My Godliness for every creation” (Rashi, Genesis 17:1). But when a person—because of haughtiness—fails to guard the brit, he makes a god of himself. He makes it appear as though there is not enough in His Godliness for him, so that he requires idol worship. And thus he blemishes the Name Shadai ; for there is enough of His Godliness for every creation. Whereas, by guarding the brit, he is rewarded with a light that directs him to repentance, as above.