1 Corinthians 15:57-58Amplified Bible (AMP)

⁵⁷ but thanks be to God, who gives us the victory [as conquerors] through our Lord Jesus Christ.
⁵⁸ Therefore, my beloved brothers and sisters, be steadfast, immovable, always excelling in the work of the Lord [always doing your best and doing more than is needed], being continually aware that your labor [even to the point of exhaustion] in the Lord is not futile nor wasted [it is never without purpose].