During the Day of Atonement ceremony, the high priest wore simple linen clothes instead of his usual robes. This probably symbolized the humility everyone should have on this solemn day. The high priest stood in front of God as the representative of the people. But he had nothing to boast about for himself or them. But when he stood in front of the people for God, his official robes showed God's glory and splendor (Leviticus 16:23).