How do we know the grace of God in ministry is not received in vain?

Paul urges ministers in 2 Corinthians 6:1 to not receive the grace of God in vain, which refers to the gifts and callings He has given for ministry. Grace is not merely an offer, but a powerful, effectual work that equips ministers for their task. To receive this grace in vain would mean to neglect or misuse the gifts given for preaching and teaching. Instead, ministers are encouraged to actively use their gifts and fulfill their calling, illustrating that true grace demands engagement and responsibility in ministry.