The following is from the fourth chapter of John MacArthur's book, None Other: Discovering the God of the Bible, which is titled, "The God of the Bible is Holy."
Scripture doesn't just talk about God's holiness; it reveals His holiness. In fact, every revelation of God is a revelation of His moral perfection (pg.69).
In heaven, when God's holiness is mentioned in worship, the word is multiplied three times: "Holy, holy, holy." (Isa. 6:3). No doubt, the threefold expression of praise is a Trinitarian reference, but it also emphasizes the utter and absolute distinction of God's moral perfection (pg.71).
Scripture is loaded with warnings about living in this world, because unlike Christ, we are easily susceptible to the enticements of sin, even though we are redeemed (pg.75).
The exalted Lord of heaven is our High Priest who sympathizes with our infirmities, who triumphed over evil, and whose perfection has become our salvation. It is Him we love and serve. We must be overwhelmed by the glory of our Christ and His utter holiness. To Him we give all the glory. (pg.84).