Colossians 2:10: “and in Christ you have been brought to fullness. He is the head over every power and authority.”
Fullness in this verse basically means perfection. Christ is the only way to achieve it. We have to abide in him if we expect to reach it. The only perfect human being that ever walked on the face of the earth was Jesus. Ok, Adam and Eve were too before the fall. No other one was perfect in a real sense of word. However, as God sees us through the sacrifice of Christ we may attain perfection. At least, we should try to go after it. As we attempt to follow Jesus and stay in his words we are well into becoming perfect in the eyes of God. Why? Because if you are in him you are like him. It means you are perfect. Good luck with that.