Somehow Moses defied the law of entropy that states that all systems lose energy over time. Why was his energy unabated? Because his eyes were undimmed.
Words of Torah which seem poor and unimportant in one Torah text contain rich and meaningful information and insight when viewed in the perspective of another text.
On the one hand, Israel is the bride, and the Written Torah is the groom, influencing the bride with its Divine wisdom. On the other hand, the Oral Torah is given over to the Jewish people like a bride, to be learned, taught, developed, expanded upon, and beautified.