J. B. Lightfoot on Colossians 1:23

ἀπὸ τῆς ἐλπίδος τοῦ εὐαγγελίου οὗ ἠκούσατε, τοῦ κηρυχθέντος ἐν πάσῃ κτίσει τῇ ὑπὸ τὸν οὐρανόν, οὗ ἐγενόμην ἐγὼ Παῦλος διάκονος. τῆς ἐλπίδος κ.τ.λ.] ‘_the hope held out by the Gospel_,’ τοῦ εὐαγγελίου being a subjective genitive, as in Ephes. i. 18 ἡ ἐλπὶς τῆς κλήσεως (comp. iv. 4). ἐν πάσῃ κτίσει] ‘_among every creature_,’ in fulfilment of the Lord’s last command, Mark xvi. 15 κηρύξατε τὸ ευαγγέλιον πάσῃ τῇ κτίσει. Here however the definitive article, though found in the received text, ἐν πάσῃ τῇ κτίσει, must be omitted in accordance with the best authorities. For the meanings of πᾶσα κτίσις, πᾶσα ἡ κτίσις, see the note on ver. 15. The expression πᾶσα κτίσις must not be limited to man. The statement is given in the broadest form, all creation animate and inanimate being included, as in Rev. v. 13 _πᾶν κτίσμα_ ... καὶ τὰ ἐν αὐτοῖς _πάντα_ ἥκουσα λέγοντα κ.τ.λ. For the hyperbole ἐν πάσῃ κτίσει compare 1 Thess. i. 8 ἐν παντὶ τόπῳ. To demand statistical exactness in such a context would be to require what is never required in similar cases. The motive of the Apostle here is at once to emphasize the universality of the genuine Gospel, which has been offered without reserve to all alike, and to appeal to its publicity, as the credential and guarantee of its truth: see the notes on ver. 6 ἐν παντὶ τῷ κόσμῳ and on ver. 28 πάντα ἄνθρωπον. οὖ ἐγενόμην κ.τ.λ.] Why does St Paul introduce this mention of himself so abruptly? His motive can hardly be the assertion of his Apostolic authority, for it does not appear that this was questioned; otherwise he would have declared his commission in stronger terms. We can only answer that impressed with the dignity of his office, as involving the offer of grace to the Gentiles, he cannot refrain from magnifying it. At the same time this mention enables him to link himself in bonds of closer sympathy with the Colossians, and he passes on at once to his relations with them: comp. Ephes. iii. 2–9, 1 Tim. i. 11 sq., in which latter passage the introduction of his own name is equally abrupt. ἐγὼ Παῦλος] i.e. ‘weak and unworthy as I am’: comp. Ephes. iii. 8 ἐμοὶ τῷ ἐλαχιστοτέμω πάντων ἁγίων.