The following is from the sermon, He is Worthy Part 2.
In the year that King Uzziah died, I saw the Lord sitting upon a throne, high and lifted up; and the train of his robe filled the temple. 2 Above him stood the seraphim. Each had six wings: with two he covered his face, and with two he covered his feet, and with two he flew. 3 And one called to another and said: “Holy, holy, holy is the Lord of hosts; the whole earth is full of his glory!”
In the Old Testament, the dominant way the authors emphasized something was through repetition, it was their way of saying, “This is what's most important.” Repetition also served as a way of taking things to the superlative degree, (i.e. “This is better. This is the best.”) Repeating a word or phrase three times demonstrated it was the highest it could be.
God’s Holiness Defines Himself
In Isaiah 6 the seraphim are saying God is holy, holy, holy - in other words, He is the absolutely holiest. He’s categorically set apart from anything else. He stands alone, He stands above. If you look throughout Scripture, the holiness of God is the only attribute ever used three times in succession.
We never read God is love, love, love or grace, grace, grace or compassion, compassion, compassion.
God’s Holiness Defines Everything Else
Now is He love? Yes, absolutely. (1 John 4:16) But God's holiness is what defines His love. It's the basis on which His love stands. God's holiness defines all of His other attributes.
So God is love, but He's better than that. He is Holy, holy, holy love. His love is other. It's better. It's set apart. It's distinct. It's unique. It's more than we could ever imagine. That means that He is the author of true love. He's the one who defines love.
This means God is not like you. The Bible tells us that humanity is created in God's image so we uniquely reflect God in ways that other creatures or creation doesn't. That's a unique part of being human but if we're not careful, we can begin to believe the lie that just because we are like God, that means God is like us, but He's not.
God’s Holiness Sets Him Apart from You
You are like God, but God is not like you. He doesn't think like you do. He doesn't dwell and exists in the world like you do. He doesn't reason like you do. He exists alone, separate, and apart. That's the God we worship. And He is worthy.