Musar do Wyjścia 28:40

The original "jewelry" had been taken from Man due to the powerful impact of Adam's sin. At that time Man's original vestments were exchanged from כתנות אור, garments made of light, for כתנות עור, garments made of hide (Genesis 3,21). The Torah, in our portion, orders that כתנות, tunics, be made for Aaron's sons (28,40) who had to be dressed in sacred vestments. They put on שמן משחת קודש, holy anointing oil, on their bodies before they dressed in the sacred vestments. By following this procedure, the priests ceased being זרים, strangers or "outsiders," before putting on garments which could not be worn by non-priests. When Adam became a זר, outsider, this was due to the pollutant with which the serpent had infected him. It was this pollutant from which he had to be purified. Aaron was the human being through whom this rehabilitation of Man was achieved. He had to be separate to sanctify his body. He thereafter dressed in the sacred vestments which conferred upon him כבוד ותפארת, the very kind of visible distinction that Adam enjoyed while dressed in garments made of light. The pollutant present in Man because of the serpent's infection was converted into something positive by means of the breastplate Aaron wore on his heart. The Ineffable name of G–d was engraved on the stones of the breastplate The names of the 12 tribes as well as the names of the patriarchs Abraham, Isaac, and Jacob were engraved between the 12 gemstones set in it. The latter represented the מרכבה, whereas the former represented the twelve possible ways of arranging the letters of the Ineffable Name.