The believer is simply a "jar of clay". It's the treasure within the vessel that gives the vessel its value.
2 Corinthians 4:7 But we have this treasure in earthen vessels, that the excellency of the power may be of God and not of us.
God has made us the way we are so that we can do the work He wants us to do. The important thing about a vessel is that it be clean, empty, and available for service.
Each of us must seek to become a vessel unto honor, sanctified (set apart), and meet for the Master's use. We are earthen vessels so that we might depend on God's power and not our own.
We must focus on the treasure and not the vessel. Sometimes the treasure spills out and blesses others.