Philippians 2:3 Do nothing out of selfish ambition or vain conceit, but in humility consider others better than yourselves
That is easy for a human being to do. It should be much harder for someone who is divine to actually do that. Two verses later :
5 Your attitude should be the same as that of Christ Jesus:
Does that have something to do with verse 3 ? Of course it does. How is that ?
6 Who, being in very nature God, did not consider equality with God something to be seized
That doesn't sound like a great starting point for coming up with humility, especially not towards sinful human beings.
7 but made himself nothing, taking the very nature of a servant, being made in human likeness.
Already in that act, he humbled himself before us beyond what we can conceive of. From God to human being in the space of the incarnation.
8a And being found in appearance as a man
Why did I cut the verse there ? Because that part is very important. He walked the Earth for over thirty years and nothing he ever did amounted to exalting himself out of being a human being and to where he was something that didn't qualify as human any longer. To someone who is essentially God, that could have been the greatest test of all, prior to his ordeal. It gets worse.
8b he humbled himself and became obedient to death-- even death on a cross!
He couldn't have gotten any lower than that, to suffer the worst death the Roman empire had for a rank criminal. And he underwent that willingly.
9a Therefore God exalted him
It is easy to read the verse as if it doesn't say "therefore", as if that word doesn't refer back to the previous 3 verses. As if it merely says that God exalted him since he was really divine. It doesn't say that. It says that he exalted him because he had humbled himself from divine and to where he was held to be the lowest among human beings. What does it mean ? It means that he considered others, all of us, better than himself. In the sense that he was willing to humble himself to death so that we could have life.
In that very act he proved that he is in fact divine. Not simply by birthright, but by conduct. To where did God exalt Jesus ?
9b to the highest place and gave him the name that is above every name
10 that at the name of Jesus every knee should bow, in heaven and on earth and under the earth,
11 and every tongue confess that Jesus Christ is Lord, to the glory of God the Father.
God can do that. He doesn't have to keep humbling Jesus to where the others are better than him. He is God and he can do whatever he wants. Back to where this started, verse 5 :
5 Your attitude should be the same as that of Christ Jesus:
Want to show yourself to be a parttaker in the divine nature ?
Now you know how.
Jesus is looking for servants who will be true to this principle unto death