Chief attribute of God and a quality to be developed in his people. “Holiness” and the adjective “holy” occur more than 900 times in the Bible. The primary OT word for holiness means “to cut” or “to separate.” Fundamentally, holiness is a cutting off or separation from what is unclean, and consecration to what is pure.
ISAIAH 6:5–7: HOW ARE WE TO UNDERSTAND THE VISION OF THE KING IN HIS HOLINESS?
Whatever obstacle there existed to your communicating the message of God to this people, arising from your own consciousness of unworthiness, is taken away. You are commissioned to bear that message, and your own consciousness of guilt should not be a hindrance.