Final answer:
Paul encouraged the Corinthians to be steadfast and unmovable, always abounding in the work of the Lord, which includes acts of kindness and spreading the Gospel.
Step-by-step explanation:
Paul wanted the Corinthians to be steadfast, unmovable, always abounding in the work of the Lord. This is evident from his epistles where he encourages the believers in Corinth to remain firm in their faith and to continually engage in good works as an expression of their belief. The work of the Lord refers to acts of kindness, spreading the Gospel, and other actions that demonstrate one’s faith in Christ, which Paul esteemed highly and saw as crucial to the life of a believer.