Agur, son of Jakeh, speaks of a mysterious prophecy in Proverbs 30:4, asking, 'Who has gone up to heaven and come down? Who has gathered up the wind in the hollow of his hands? Who has wrapped up the waters in a cloak? Who has established all the ends of the earth? What is his name, and what is the name of his son? Surely you know!' How does Christian theology MOST commonly interpret this rhetorical question?