“I commission you as my spokesman; I cover you with the palm of my hand, to establish the sky and to found the earth, to say to Zion, ‘You are my people.’”
God called his servant to create a new universe: transform Israel to be his true people. The three infinitives refer to the same work that God does through his servant.
God uses his servants for cosmic effect, though they may not see it. Have you answered his call to serve him by being his spokesperson?