Christ's Church is like a building that needs a lot of contractors to work on it.1. Paul was a skilled master builder. (v.10)2. Christ is our foundation. (v.11)3. Christ's workers build on the Christ-foundation. (v.12-15)Why do we get to participate?What is the reason that Paul could build? 2 Tim. 1:9Who asks contractors to come and build? Mt. 16:18, Gal. 1:15Who gives rewards to whom for what? Rev. 11:18