Exodus 28:38
And it shall be upon Aaron’s forehead, that Aaron may bear the iniquity of the holy things, which the children of Israel shall hallow in all their holy gifts; and it shall be always upon his forehead, that they may be accepted before the LORD.
The forehead of the high priest bore a gold plate fastened by a blue lace to a white linen turban, inscribed Holiness to Jehovah, marking him as set apart as holy to the Lord. That plate belonged to detailed, symbolic directions for Aaron's garments, showing that the God who moves the world and sustains life and health cares about and has a preference regarding the dress of those who serve Him. The dress of Christ's followers should likewise be symbolic and represent Him.
The care shown in the priestly clothing and conduct was meant to teach Israel and to impress every beholder with the holiness of God, the sacredness of His worship, and the purity required of those who come into His presence. Order is required in everything connected with divine service, especially cleanliness, and God may be honored or dishonored by the apparel of those who officiate before Him. He gave special directions to Moses about everything connected with His service, including specifying the dress for those who minister before Him.
Aaron bearing on his forehead the divine name and the iniquity of the holy gifts so that Israel may be accepted reveals Jesus as the Aaron-like greater High Priest who bears the name of Jehovah on His forehead covering and the name of Israel on His breastplate to bear iniquity and secure acceptance. As Son over His own house Christ is greater than Moses, and He carries with Him all who receive Him and believe in His name. This was fulfilled when the prophetic periods closed in 1844 as Jesus ended His ministration in the holy place, closed the door of that apartment, clothed Himself in precious priestly garments including a robe with a bell and a pomegranate around the bottom, a glittering breastplate of curious work with enlarged lettering like names, and a crown-like covering on His head, and then, fully attired and surrounded by angels, passed in a flaming chariot within the second veil into the most holy place to cleanse the sanctuary and make a special atonement for Israel.
The inscription of holiness to the Lord is to rest upon God's saints and even upon their common temporal things. It means the whole person is disciplined by the grace of Christ who made all and redeemed all, so that mind, strength, body as well as soul share in the divine nature as His purchased possession. He must be served with whole mind, heart, soul and strength, and glorified in the entire life, and thus He will be glorified in them.