Rabbi Judah HaNasi and his household were known for their dignified appearance, but the principle of "shining through cleanliness" extended throughout the rabbinic world. The Talmud (Nedarim 49b) records that even scholars who lived in grinding poverty maintained their garments and persons with meticulous care.
Rabbi Akiba's wife Rachel is one example. When she married him, he was an illiterate shepherd, and they were so poor that they slept on straw. Yet she never allowed their poverty to become an excuse for carelessness. She encouraged him to study, sold her hair to pay for his education, and maintained their small household with a dignity that belied their circumstances.
The sages derived from such examples a striking teaching: the body is on loan from God. Just as a person entrusted with a king's garment would wash it, fold it, and keep it in perfect condition, so must every person care for the body God has given them. Hillel the Elder, when he went to the bathhouse, called it a mitzvah — a religious obligation. "If the statues of kings in theaters and circuses are washed and scrubbed by those appointed to maintain them," Hillel reasoned, "how much more should I, who am created in the divine image, take care of my body?"
Cleanliness, in the rabbinic mind, was the first step toward holiness. Not because dirt was sinful, but because caring for what God has given you is a form of gratitude — and gratitude is the foundation of all worship.