Philippians 2:6-11 is probably one of the earliest Christian hymns ever recorded. Within the hymn are the words, “who, though he was in the form of God, did not regard equality with God as something to be exploited, but emptied himself, taking the form of a slave, being born in human likeness.” (Phil 2:6,7). This part of the hymn describes how Christ humbled himself in his divinity in obedience to the will and desire of God in an act of selfless sacrifice, even to death on a Cross, for the salvation and redemption of mankind. It is a powerful image.
The term kenosis comes from the Greek κενόω (kenóō), meaning “to empty out”. When talking about how Christ “emptied himself” in Philippians 2:7, the Greek word used is ἐκένωσεν (ekénōsen). It is the only time the word appears in the New Testament.
The fact that Christ was willing and able to “empty himself” in order to do the will of God the Father is key to His success as both savior and redeemer. Without this “kenosis”, He could not have done, or been either.