Exodus 28:38

Iniquities. This means, perhaps, that he shall wear these grand vestments and crown only on the solemn day of expiation, when he makes atonement for all the sins of the people, as a figure of Jesus Christ. Josephus tells us, that on other occasions, he wore a less costly attire. (Jewish Wars v. 6. or 15.) (Calmet) --- By bearing on his forehead kodesh la Yehovah, "Holiness to the Lord," he confessed that all mankind were sinners, and stood in need of pardon. (Haydock)