Let this mind be in you which was also in Christ Jesus, who, being in the form of God, did not consider it robbery to be equal with God, but made Himself of no reputation, taking the form of a bondservant, and coming in the likeness of men. And being found in appearance as a man, He humbled Himself and became obedient to the point of death, even the death of the cross.
Philippians 2:5-8 NKJV
Christ went from the highest of possible highs to the lowest of possible lows. He left Heaven and became a human being, then He died the most horrific and shameful death imaginable — crucifixion on a cross. As His followers, we need to have the same humble, self-sacrificing attitude Jesus did. There is no place for pride in His kingdom. Empty yourself, give up your rights, put others first. This is the mind of Christ which must be in you.