Answer: God's children should always give themselves FULLY to the work of the Lord. We can do this because we know that our labor in the Lord is not in vain, (1 Corinthians, chapter 15, and verse 58).
MORE INFORMATION AND/OR OTHER SCRIPTURE REFERENCES:
Serving Christ is not an empty, useless (vain) activity. Our work for the Lord is for a winning cause. We will not lose, and neither will those who listen to, believe in and obey the Gospel of Christ that we proclaim for the Lord. We must give ourselves to this work with all of our heart--wholeheartedly and FULLY:
Colossians 3:23-24: "Whatever you do, work at it with all your heart, as working for the Lord, not for men, since you know that you will receive an inheritance from the Lord as a reward. It is the Lord Christ you are serving."
Ephesians 6:7-8: "Serve wholeheartedly, as if you were serving the Lord, not men, because you know that the Lord will reward everyone for whatever good he does, whether he is slave or free."
