J. B. Lightfoot on Colossians 2:17-18

τῶν μελλόντων, τὸ δὲ σῶμα τοῦ Χριστοῦ. ^{18}μηδεὶς τὸ δὲ σῶμα κ.τ.λ.] As the shadow belonged to Moses, so ‘_the substance belongs to Christ_’; i.e. the reality, the antitype, in each case is found in the Christian dispensation. Thus the passover typifies the atoning sacrifice; the unleavened bread, the purity and sincerity of the true believer; the pentecostal feast, the ingathering of the first fruits; the sabbath, the rest of God’s people; etc. 18. The Christian’s career is the contest of the stadium (δρόμος, Acts xx. 24, 2 Tim. iv. 7); Christ is the umpire, the dispenser of the rewards (2 Tim. iv. 8); life eternal is the bay wreath, the victor’s prize (βραβεῖον, 1 Cor. ix. 24, Phil. iii. 14). The Colossians were in a fair way to win this prize; they had entered the lists duly; they were running bravely: but the false teachers, thrusting themselves in the way, attempted to trip them up or otherwise impede them in the race, and thus to rob them of their just reward. For the idea of καταβραβεύετω compare especially Gal. v. 7 ἐτρέχετε καλῶς· τίς ὑμᾶς ἐνέκοψεν κ.τ.λ.