Bede

The priest who offers the holocaust is the Lord who is himself accustomed to kindle in us the fire of his charity and through it to make the sacrifices of our good actions acceptable to himself. And he is clothed in linen garments when he does these things because, in order that he may excite us to works of virtue, he sets before us the examples of his own incarnation, passion and death, which can be signified by linen, as we have frequently said.

On the Tabernacle 2.11 ↗