This sermon examines Galatians 2:1-10 to reveal three core truths about the nature of the gospel: it advocates for the sinner, joins hands in fellowship, and builds one unified house. The text highlights Paul's defense of Titus against legalistic demands, illustrating how the gospel removes the burden of self-justification and welcomes Gentiles into the covenant without partiality. It further explores the right hand of fellowship extended by Peter, James, and John, emphasizing that the church operates under a singular mission despite diverse strategies and backgrounds. Finally, the passage is interpreted through the lens of temple typology, presenting the church as God's dwelling place constructed from both Jews and Gentiles. The tone is pastoral and instructional, encouraging believers to rest in Christ's finished advocacy and to pursue unity in the shared mission of advancing the gospel.