Jesus of Nazareth is divine. He was born into this world over 2000 years ago, but he has always existed. He is immortal and infinitely powerful. He entered into time and space through the womb of Mary. He gave up a lot in doing this. He surrendered the unlimited power, knowledge and glory that is His by divine right. He did not put on a “human suit” and pretend to be one of us. That would have been a fraud and a cheat.
Paul is telling us that Jesus did not greedily clutch his divine attributes. He did not fake humanity—he was truly “one like us in all things but sin”. Jesus wasn’t slumming. He showed that is possible to reach heaven the way that He did: with the love of the Father. He clung to equality with us.