Who has gone up to heaven and come down?
Who has gathered up the wind in the hallow of His hands?
Who has wrapped up the waters in His cloak?
Who has established all the ends of the earth?
What is His name, and the name of His son?
Tell me if you know!
----- Proverbs 30:4

We all know what it is now and who He is as He gave his life up for us on the cross.
Who has gone up to heaven and come down or extablished all the ends of the earth?
Who else could that be but God clearly stating: He has a Son.