The working out of the plan of salvation from first to last is bound up in Christ Jesus. The three titles of this verse gather up the activities of Christ in relation to man’s salvation (cf. on ch. 1:17).
Beginning and the end.
All created things owe their existence to Christ; all things find their end in relation to Him. Compare on Col. 1:16, 17.
Alpha and Omega.
These are the first and last letters of the Greek alphabet, used as descriptive of the Lord as the Creator of all things and as the beginning and final revelation of God to men (cf. on ch. 1:8).