Albert Barnes Commentary Colossians 2:10

"and in him ye are made full, who is the head of all principality and power:" — Colossians 2:10 (ASV)

And you are complete in him. You have no need, for the purposes of salvation, of any aid to be derived from the philosophy of the Greeks or the traditions of the Jews. All that is necessary to secure your salvation is to be found in the Lord Jesus. There is a completion, or a filling up, in him, so as to leave nothing lacking. This is true with respect to:

1. The wisdom which is necessary to guide us;
2. The atonement to be made for sin;
3. The merit by which a sinner can be justified; and
4. The grace which is necessary to sustain us in the trials and to aid us in the duties of life. (See Barnes on 1 Corinthians 1:30).

There is no necessity, therefore, that we should look to the aid of philosophy, as if there were a defect in the teachings of the Saviour; or to human strength, as if he were unable to save us; or to the merits of the saints, as if those of the Redeemer were not sufficient to meet all our needs. The sentiment advanced in this verse would overthrow the whole papal doctrine of the merits of the saints and, of course, the whole doctrine of papal "indulgences."

Which is the head. (See Barnes on Ephesians 1:21; Ephesians 1:22).