Passage
Whereunto I also labour, striving according to his working, which worketh in me mightily.
Whereunto I also labour, striving according to his working, which worketh in me mightily.
Colossians 1:27 To whom God would make known what is the riches of the glory of this mystery among the Gentiles; which is Christ in you, the hope of glory:
Colossians 1:28 Whom we preach, warning every man, and teaching every man in all wisdom; that we may present every man perfect in Christ Jesus:
Colossians 1:29 Whereunto I also labour, striving according to his working, which worketh in me mightily.
The verse centers on "whereunto", "labour", "striving", "working", "worketh", and "mightily". It is saying that the verse draws attention to "whereunto" and "labour", so its meaning should be read from those terms before moving to application.
The prior verse says "Whom we preach warning every man and...", giving immediate footing for "whereunto" and "labour". In Colossians context, the local focus is Christ, faith, and discipleship.
A plain takeaway is to answer the verse's own emphasis on "whereunto" and "labour" with trust shaped by these words, not by a vague optimism outside the passage.