The following quote comes from the book, When People Are Big and God Is Small (Overcoming Peer Pressure, Codependency, and the Fear of Man) by Edward T. Welch. The quote comes from chapter 6 – Know the Fear of the Lord –
To whom will you compare me? Or who is my equal?” says the Holy One. (Isa. 40:25)
Some have called this “otherness,” this holiness, of God his transcendence. God is exalted above his people. He lives in a high and lofty place (Isa. 57:15). His judgement and mercy are above us, they are ultimately incomprehensible. As a result, we don’t use a reigning king or queen as our template for knowing God. To say that the Holy God reigns makes it impossible to use earthly kings as the model. The Holy God is unique, greater, and of a different kind than earthly kings. The Holy God is the original; the most glorious of earthly kings are only a dim reflection.
To make the holiness of God even more awesome, the transcendent God has come close to us. It would be one thing to know that God was gloriously transcendent and entirely separate from his creation. In such a situation we could become acccustomed to his lack of intervention in human affairs, and for practical purposes we could become our own gods. But our God is also the Immanent One who has revealed himself and become like us. He said, “I will be your God and you will be my people” (Lev. 26:12). He is near us. He will never leave us or forsake us (Heb. 13:5). He is so close he calls us “friends” (John 15:14). He is so close, the Scripture talks about Christ in you (Col. 1:27). Given his nature, this is virtually impossible for us to grasp. But, by God’s grace, we can grow in knowing his holiness, and this knowledge will both expel the people-idols from our lives and leave us less prone to being consumed with ourselves.