Answer: Jesus had the very form, or nature, of God, being equal with God, (verse 6).
MORE INFORMATION AND/OR OTHER SCRIPTURE REFERENCES:
John 1:1: "In the beginning was the Word, and the Word was with God, and the Word was God. He was with God in the beginning."
John 5:18: "For this reason the Jews tried all the harder to kill Him [Jesus]; not only was He breaking the Sabbath, but He was even calling God His Own Father, making Himself equal with God."
And again, John 14:9-10: "Jesus answered: ‘Don't you know Me, Philip, even after I have been among you such a long time? Anyone who has seen Me has seen the Father. How can you say, "Show us the Father"? Don't you believe that I am in the Father, and that the Father is in Me? The Words I say to you are not just My Own. Rather, it is the Father, living in Me, Who is doing His work.'"
