Our thoughts and imaginations cannot limit God. God is all powerful. He is all knowing. He is all present. There is nothing that God cannot do; there is nothing that God does not know; and there is no place at any time that he is not present. God is Almighty.
We are limited in many ways. We are limited in our ability and power. As people grow older, they become weak and unable to do some things again. That is the limitations of man. Man can be limited in many ways. When man boost, he is boasting of what he has or can do at such times. If he can do one aspect, there's another aspect which he has no idea about.
So, God is bigger than our thoughts and mind. There is nothing that he is not sufficient enough. Our human limitations cannot limit God. He is not defined by what we can comprehend with our minds.