God's Being is Totally Unique

From Wayne Grudem's Bible Doctrine: 

“It’s not just that we exist and God has always existed; it is also that God necessarily exists in an infinitely better, stronger, more excellent way. The difference between God’s being and ours is more than the difference between the sun and a candle, more than the difference between the ocean and a raindrop, more than the difference between the arctic ice cap and a snowflake, more than the difference between the universe and the room we are sitting in: God’s being is qualitatively different.”