On the mitre, which is a head dress for the High Priest, was written, ” Holiness Unto the Lord”. Pulpit says it intensified all aspects of the priestly robe. It required the Priest to be holy for himself in consecration and for others in representation so that the people will be accepted by God. Holiness is the act of being set apart for Gods use. Every child of God is set apart at salvation, but is is also a continuous process( 1 These.5;23 ) demanded to stay connected. Holiness is a ” life of discipline, focus and attention to matters of righteous living”. It can’t be done by obeying rules, but by a total transformation unto Gods leadership. Jesus demonstrated this standard of living on earth. We are expected to live holy therefore in an unholy world. That is what sets us apart. In where we are expecting to go, the highway is called, the way of holiness (Isa 35:8). Nothing unclean will be there. So living holy on earth prepares us to be familiar with the living standards there. Isn’t it significant that in the old testament, the Priest had to bear this on his forehead. That’s a place for everyone to notice. So your holiness too must be noticed by others.
And thou shalt make a plate of pure gold, and grave upon it, like the engravings of a signet, HOLINESS TO THE LORD. 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. Exodus 28:36, 38 KJV