ATHANASIOS N. PAPATHANASIOU (**) Is our Lord Jesus Christ a liar? Before hurrying judge this question as a blasphemy, let us remember how Christ himself describes his second coming and final judgement: On that day many will say him, 'Lord, Lord, did we not prophesy in your name, and in your name drive out demons and perform many miracles?' Then he will tell them plainly, 'I never knew you. Away from me, you evildoers!' (Matt: 7:22-23). It is here that above posed blasphemous question arises. How can Jesus claim that he never knew them? Is it possible that omniscient God ignores very existence of some creatures? The answer lies in understanding of verb to and term knowledge. What Christ means here is apparently not mere mental knowledge, collection of information, but something much more than that: real knowledge is personal relationship, communion between persons. really know someone insofar as share my life with him/her in love, as Christ has asked us. (1) What human being is being called by God is participation in a community. When disciples met Christ after his resurrection, they did not recognize him until he sat at table with them and shared food with them (Luke 24:30-32). What makes me a Christian is not individualistic acceptance of an ideology, but participation in a meal, that is, in eucharistic gathering of church. Here we can recognize one another as concrete persons, experience presence of God, manifest faith and anticipate final gathering in eschata, wedding supper of Christ and church (Rev. 20:9, 21:2). It is not by chance that first who spoke about catholicity of church, spoke in connection with eucharistic gathering and construction of a local church. It was St Ignatius of Antioch, who, in his letter Smyrnaeans (ca 100 AD), wrote, Where Christ is, there is Church. (2) As we can see, Ignatius uses-an adjective (catholic), not a noun (catholicity). The same happens in creed: I believe in one holy and apostolic Church.... This is of special importance. Catholicity is not an abstract concept or an ideological formula, but mode of life of a certain community, that is, church, body of Christ. (3) The term catholic (hence catholicity) derives from Greek expression kath'holou, which denotes totality or integrity. Applied church, it has not got a mere geographical meaning. It certainly implies worldwide expansion of Christianity, but primarily it signifies inner wholeness and integrity of church's life. (4) The term is used as equivalent of Orthodox mark difference of church from every other Christian group or denomination, which may hold parts of truth but not whole truth. The church is catholic, because she accepts and experiences whole truth incarnate, Jesus Christ, and serves transformation of whole world (with no dichotomies between so-called spiritual and material aspects of life) into flesh of Jesus Christ. So, church is not only because she holds truth, but also because she manifests and offers it whole of humankind. These two elements of ecclesiastical life (the experience and manifestation of truth) are definitely inseparable. If church does not proclaim her truth (that is, rebukes her missionary task), she loses catholicity. According St Paul, church is Christ's body, the fullness of Him who fills everything in every way (Eph. 1:23). It is a truly daring concept: If church is fulfilment, completion of Christ, it means that Christ is incomplete without church, his body, so much same as church is incomplete without Christ, her head! St John Chrysostom comments on St Paul's words and emphasizes that, since body consists of all parts, Christ needs every single member of his. …