1 Corinthians 15:2, 58

For it is through the revelation of the gospel that you are being saved, if you fasten your life firmly to the message I’ve taught you, unless you have believed in vain.

So now, beloved ones, stand firm, stable, and enduring. Live your lives with an unshakable confidence. We know that we prosper and excel in every season by serving the Lord, because we are assured that our union with the Lord makes our labor productive with fruit that endures.