The Scofield Bible Commentary, by Cyrus Ingerson Scofield, [1917], at sacred-texts.com
mystery of God
The "mystery of God" is Christ, as incarnating the fulness of the Godhead, and all the divine wisdom and knowledge for the redemption and reconciliation of man.
mystery
(See Scofield) - (Mat 13:11).
and of
The best authorities omit "and of the Father, and of Christ."
world
Greek, "kosmos", means "mankind".
(See Scofield) - (Mat 4:8).
the sins of
Omit "the sins of."
intruding into those things
The errorists against whom Paul warns the Colossians, and against whom, in principle, the warning has perpetual significance, were called "Gnostics," from the Greek, "gnosis", meaning "knowledge."
These Gnostics "came most keenly into conflict with the exalted rank and redeeming rank of Christ, to whom they did not leave His full divine dignity, but assigned to Him merely the highest rank in the order of spirits, while they exalted angels as concerned in bringing the Messianic salvation." -- H.A.W. Meyer.
Paul's characteristic word, in Colossians, for the divine revelation is the Greek, "epignosis", that is, "full knowledge", (Col 1:9); (Col 1:10); (Col 3:10) as against the pretended "knowledge" of the errorists. The warnings apply to all extra-biblical forms, doctrines, and customs, and to all ascetic practices.
angels
(See Scofield) - (Heb 1:4).
world
Greek, "kosmos", means "world-system". (Jam 1:27); (Joh 7:7).
(See Scofield) - (Rev 13:8).
not in any
Or, "which do not really honour God, but only satisfy the flesh" (that is, by creating a reputation for superior sanctity).