His Self-existence and Self-sufficiency sets Him apart from all His creation.
God’s self-existence is at the very core of the difference between the Creator and creation.
His being is a fundamentally different kind of being to ours.
It is not just that He has existed for longer (a quantitative difference in being);
He exists with an entirely different being (a qualitative difference).
He is the Creator, existing before and apart from creation.
Everything else exists as His creation, entirely dependent on His will that it should be and that it should continue existing.
"O LORD, how many are Your works!
In wisdom You have made them all;
The earth is full of Your possessions.
They all wait for You . . . You give to them.
You hide Your face, they are dismayed;
You take away their spirit, they expire.
You send forth Your Spirit,
They are created;
And You renew the face of the ground.
Let the glory of the Lord endure forever;
Let the Lord be glad in His works. (Ps 104:24-31)
(Spotlight 8, Lesson 2 in Doctrine 101: Learning about God)