Most often , Christians speak of fellowship as an activity or subjective experience. Yet, “fellowship” translates the Greek word “koinonia” and a better translation would be “invested partnership” or “a sharing together”: fellowship is an objective reality.
John Stott explains:
In common usage fellowship describes something subjective, the experience of warmth and security in each other’s presence, as in ‘We had a good fellowship together.’ But in biblical usage koinonia is not a subjective feeling at all, but an objective fact, expressing what we share in together.
So Paul could write ‘you share in God’s grace with me’ (Philippians 1:7); John could write ‘that you may have fellowship with us, and our fellowship is with the Father and his Son Jesus Christ’ (1 John 1:3); while Paul added ‘the fellowship of the Holy Spirit’ (2 Corinthians 13:14). Thus authentic fellowship is Trinitarian fellowship. It bears witness to our common share in the grace of God, Father, Son, and Holy Spirit.
Is this not what makes us one? We come from different countries, cultures, and churches. We have different temperaments, gifts, and interests. And yet we have this in common: the same God as our Heavenly Father; the same Jesus Christ as our Savior and Lord; and the same Holy Spirit as our indwelling comforter.
It is our common participation (our koinonia) in God (Father, Son, and Spirit) which unites us. And this is most vividly expressed in the Lord’s Supper or Eucharist. For ‘is not the cup of thanksgiving for which we give thanks a participation in the blood of Christ? And is mot the bread that we break a participation in the body of Christ?’ (1 Corinthians 10:16). John Stott, The Living Church, IVP, 2007, Downers Grove, 91.

