who, though he was in the form of God, did not count equality with God a thing to be grasped, (Philippians 2:6, ESV)This is a continuation of the sentence in the previous verse, which ended with having the mind of Christ. Therefore, this verse is speaking about Jesus. This may seem to be phrased in an odd way, but what it means is that Jesus truly has the nature of God. Equality with God is not something that Jesus would have to reach out for. It is His. He was God... He is God... He will always be God.
This verse is important for how it is setting up the next verse and beginning an illustration of humility that we are to follow. This is the example of humility that we will need if we are going to be obedient to the previous few verses of chapter two.
I feel the need to say, "Stay tuned for tomorrow's passage!"