A self-limiting God

The God of revelation is indeed not the potestas absoluta of speculation, but the God who limits Himself, in order to create room for the creature. God wills to have a real "counterpart". God creates a creature, since He limits His absoluteness. The two ideas, Creation and self-limitation, are correlative. Anyone who has taken the first idea seriously has already conceived the second. It is not that the second is a result of the first, but the second is the same as the first, only it is seen from the opposite end. The idea of the divine self-limitation is included in that of the creation of a world which is not God, and in so doing the idea of potestas absoluta or of omni-causality has been given up.—Emil Brunner, The Christian Doctrine of Creation and Redemption, 172–73

<idle musing>
Did you catch that? The very idea of creation means that God has willingly limited himself. It's not that he has become less than ominipotent in essence; he has chosen to self-limit that omnipotence.

Put another way, God is so secure in who he is that God can self-limit Godself without becoming less than God.

That is mind-boggling! I really can't wrap my head around it completely.
</idle musing>