Chapter 4: The Nature of Reality : 5.12.
5. Brahman as God or Ishvara-12.
The Supreme Lord is the Power of powers. “Agni cannot burn even a piece of straw; Vayu cannot blow even a piece of straw, apart from the Will of the Supreme” (Kena Up., III). All beings, even the gods, even the greatest powers, execute their functions properly due to their dread for this Supreme.
The Great Lord can do or undo or otherwise do the whole universe in the quick flash of a fraction of a single moment! He is also the boundless ocean of Knowledge. Even the gods cannot see Him. He cannot be known even through penance and sacrifice.
This Atman is not to be comprehended through mere discourse, intellectuality or extensive hearing; He is obtained only by him (to) whom He chooses (to reveal His Nature)” (Katha Up., I. 2. 23). This does not mean that God is an autocratic despot acting as He likes, regardless of the feelings and grievances of others.
This would be a very poor interpretation of the sentence.
To be continued ..