2 Corinthians 8:3-5 (KJV)
3 For to their power, I bear record, yea, and beyond their power they were willing of themselves;
4 Praying us with much intreaty that we would receive the gift, and take upon us the fellowship of the ministering to the saints.
5 And this they did, not as we hoped, but first gave their own selves to the Lord, and unto us by the will of God.
As Christians, fellowship is what we do. We first give ourselves over to the Lord and then unto His people and the lost.