OK, this sermon outline is great, but listening to the audio there is a point where God is presented as the most selfish being in the universe and humility is made to sound like an exclusively creaturely virtue.

If that’s what “to His glory” means, then it is emphatically false to say that God does anything to his own glory.  In fact, theism 101 dictates that we deny that God is even capable of gaining glory.  As it is written:

God hath all life, glory, goodness, blessedness, in and of himself; and is alone in and unto himself all-sufficient, not standing in need of any creatures which he hath made, nor deriving any glory from them, but only manifesting his own glory in, by, unto, and upon them (WCF ch 2).

We “glorify God,” the same way the crowds “justified God” (Luke 7.29).  They justified God by acknowledging He was in the right, and we glorify God by acknowledging that our glory comes from Him as the origin and giver.

Are we supposed to seek our own glory?  Yes, we are to seek it as a graciously-given gift which the giving God bestows on all who trust in Him.  Jesus himself said it: “If I glorify myself, my glory is nothing. It is my Father who glorifies me” (John 8.54).  And he rebuked the Pharisees:

I do not receive glory from people.  But I know that you do not have the love of God within you.  I have come in my Father’s name, and you do not receive me. If another comes in his own name, you will receive him.  How can you believe, when you receive glory from one another and do not seek the glory that comes from the only God? (John 5.41-44)

It was Satan in the Garden who told Adam and Even that glory was a zero-sum game and that God was seeking or maintaining it at their expense.  When they believed in God the grabber of glory–the false god, I mean–they became like that idol, grasping for their own glory.

Jesus reveals true deity.  God’s character is a model for humility, not self-glory.

(Yes, God is and does represent himself as the greatest king.  But that’s the point, even important rulers can be humble in their office without denying their office.)