"You shall make a plate of pure gold and engrave on it, like the engraving of a signet, 'Holy to the LORD.' And you shall fasten it on the turban by a cord of blue. It shall be on the front of the turban. It shall be on Aaron's forehead, and Aaron shall bear any guilt from the holy things that the people of Israel consecrate as their holy gifts. It shall regularly be on his forehead, that they may be accepted before the LORD. "You shall weave the coat in checker work of fine linen, and you shall make a turban of fine linen, and you shall make a sash embroidered with needlework.
Exodus 28:36-39
The mitre or head-dress of the high priest was a turban made of white linen, and adorned by a plate of gold inscribed with the words 'Holiness unto the Lord'. This inscription gathers up into itself the whole meaning of the worship of God's people. 'Be ye holy', it proclaimed from God 'for I am holy'. The words 'unto the Lord' signify something further, namely that all the people's worship was to be for His pleasure, to bring joy and delight to Him (Psalm 149:4). But there is something else. Aaron was to wear this mitre in order to bear the iniquity of the holy offerings made by the people to God, and this was a recognition that even the best of our gifts are unworthy and tainted with sin, and therefore in themselves unacceptable to God. This unworthiness the priest himself was to bear, and thus secure the people's acceptance before a holy God. In this the high priest was the type of Christ the only Mediator between God and man, in Whom and by Whom alone we can offer ourselves and the gifts we bring in the presence of the divine majesty. As Matthew Henry puts it, 'The divine law is strict; in many things we come short of our duty, so that we cannot but be conscious to ourselves of much iniquity cleaving even to our holy things; when we would do good, evil is present; even this would be our ruin if God should enter into judgment with us. But Christ, our high priest, bears this iniquity, bears it for us so as to bear it from us, and through Him it is forgiven to us and not laid to our charge'.