Koinonia: meaning of the term in the New Testament

Koinonia (κοινωνία) derives from the adjective koinós (κοινός), «common», the opposite of ìdios, «one's own, private». From koinós comes the verb koinonéo, «to have in common, to participate, to share», and the noun koinonia. The semantic field has three nuances that coexist: communion (being in relationship with), participation (having a part in something) and sharing (putting in common what one has).

The point not to be missed is that koinonia does not first describe a feeling, but a shared reality: two or more subjects have a part in one and the same thing. This is why the same term can indicate the common life of a community, participation in a sacred reality, and a collection of money. To translate koinonia only as «communion» in an affective sense halves its meaning: the word says having-in-common, a sharing that involves persons, goods and — above all — the very reality of Christ.

The first portrait is in Acts 2:42: the believers «devoted themselves to the apostles' teaching, to the koinonia, to the breaking of bread and to the prayers». Here koinonia is one of the pillars of the life of the first community, alongside doctrine, the eucharist and prayer — and it translates at once into the sharing of goods (Acts 2:44-45).

The densest text is 1 Corinthians 10:16: «The cup of blessing... is it not a koinonia of the blood of Christ? The bread that we break, is it not a koinonia of the body of Christ?». Here koinonia is real participation in the one Christ, who makes of the many a single body (1 Cor 10:17). Paul then uses the term in a concrete key in 2 Corinthians 8-9, where the collection for the poor of Jerusalem is called koinonia: communion becomes material sharing. And 1 John 1:3 lifts the gaze: «our koinonia is with the Father and with his Son».

Outside the New Testament, koinonia was an ordinary Greek term: it denoted the business partnership, the marriage bond, the association among citizens. It designated a tie in which something is really put in common — goods, life, lot. The Christian novelty is not the word, but that to which it is applied: the sharing of Christ himself.

The first community translates it into concrete practice. Alongside the eucharist there flourished the agape meals, the common meals of believers, where the sharing of food manifested the sharing of faith (cf. Acts 2:46). Paul, gathering the collection for Jerusalem, shows that koinonia crosses distances too: the Greek communities participate in the poverty of the Jewish brothers. In the background lies the Jewish ideal of tzedakah, the justice that becomes concrete charity toward the needy: communion is never merely interior, but is verified in what is shared.

For the Orthodox tradition koinonia is the heart of the ecclesial experience: the Church is first of all communion, and the eucharist is the place where this communion is realized. By receiving the body and blood of Christ (1 Cor 10:16), the many become «a single body» (1 Cor 10:17): communion with Christ founds communion among believers. It is not first an association of persons and then a relationship with God, but the reverse — the common participation in the one Lord generates the fraternal bond.

This vision preserves the Jewish root of «putting in common». As Israel constitutes itself a people around one and the same covenant and one and the same Passover table, so the Christian community becomes a body around the one eucharist. Koinonia holds together the three planes that the Greek already contained: communion with God, sacramental participation, sharing of goods with the brother. To separate them — to keep the «spiritual communion» without the concrete sharing — means, for this tradition, to lose the word itself.

The most common loss is to reduce koinonia to a feeling: «communion» as group warmth, sympathy, a sense of emotional belonging. It is an understandable reduction, because the English «communion» easily evokes affection; but it halves the word. Koinonia says having a part in one and the same reality — Christ, first of all — and from there descends the concrete sharing of goods and life.

What is lost, in that shortcut, is the link between altar and table, between eucharist and collection. It is no accident that Paul calls koinonia both the participation in the body of Christ (1 Cor 10:16) and the collection for the poor (2 Cor 8-9): it is the same word because it is the same reality declined. Recovering the full meaning — communion, participation, sharing together — does not rigidify fraternity: it restores its solidity. Authentic koinonia is measured by what is shared, not by the emotion one feels.