Jason Dohm explains in this video that holiness is an attribute of God. He is holy in His love and mercy. His holiness relates to all of his other attributes. It is one of the few attributes where it's emphasized three times -- He is "holy, holy, holy."
Revelations 4:8 (NKJV) - "The four living creatures, each having six wings, were full of eyes around and within. And they do not rest day or night, saying: 'Holy, holy, holy, Lord God Almighty, who was and is and is to come!'"
So holiness is God's master attribute in other words he has many attributes, and he's perfect in all of them But the Bible never says any of his attributes three times, but it does holiness God is holy holy holy And it really it speaks to all of his other attributes as well. He's holy in his love. He's holy in his mercy. In other words, he's other. He's separated in his love.
Nobody loves like him. Nobody has mercy like him. No one is just like him. So, his holiness actually relates to all his other attributes. As the master attribute of God, as people who are learning to be conformed into the image of Christ, then this is to be like God.
Paul says it this way in Ephesians 5 verse 1. He says, be imitators of God as dear children. So This is the life, this is the duty of the Christian. Very central to the Christian life is to learn to imitate God, to learn how to act like God. So if holiness is God's master attribute, and being separate, being peculiar, in his love, in his mercy, in his justice, in all of his attributes.
And if our task is to learn to be imitators of him, as dear children, to learn to act like our dad, then holiness is important in the Christian life, fundamental in the Christian life.