9For we are co-workers in God’s service; you are God’s field, God’s building. 10By the grace God has given me, I laid a foundation as a wise builder, and someone else is building on it. But each one should build with care. 11For no one can lay any foundation other than the one already laid, which is Jesus Christ. 12If anyone builds on this foundation using gold, silver, costly stones, wood, hay or straw, 13their work will be shown for what it is, because the Day will bring it to light. It will be revealed with fire, and the fire will test the quality of each person’s work.