Moses' name does not appear in Parshat Tetzaveh. Rabbi Levi Yitzchak of Berditchev uses this conspicuous absence to explore a question about wisdom, unity, and the priestly garments.
"A wise son brings joy to his father" (Proverbs 10:1). What is this wisdom? Job answers: "The awe of God, that is wisdom" (Job 28:28). When a person looks at the world and realizes their complete powerlessness, when they see that they owe their very existence to the Creator, awe overwhelms them. That awe is wisdom.
But wisdom goes further. God created phenomena that are direct opposites: fire and water, night and day, wind and earth. A deeper look reveals that even these opposites share a common denominator. They all emerged from the will of a single Creator. Recognizing this unity beneath apparent opposition is the highest wisdom, and it inspires the realization that all creatures should perceive themselves as part of one great whole.
The archangel Michael is made of snow. The archangel Gabriel is made of fire. Yet neither harms the other (Bamidbar Rabbah 12:7). In the heavenly realms, the peace between opposites is already achieved. On earth, we struggle to replicate it.
The priestly garments were instruments of this unification. Each tzaddik (a righteous person) has a unique "color" or style of serving God. Abraham's service was white, the color of chesed (חסד), lovingkindness. Isaac's was red, the color of gevurah (גבורה), strength. The High Priest's garments combined all colors and all modes of service into a single unified whole, a wearable Torah. When the High Priest donned these garments, he embodied the principle that opposites can coexist in the service of the one God.
Moses' name is absent from this portion because the garments represent a form of divine service that transcends any individual, even Moses. The garments atone for the entire nation, weaving together every soul's unique color into a single priestly garment of atonement.