Feast of Matthew, Apostle & Evangelist Paul Tillich can show us that the unity which we seek as Christians must involve our denominations in changes even greater than those which many of us now expect. His insistence on taking seriously the gropings of all men for the truth about their lives must be allowed to remind the ecumenical movement that the word oikoumene is Greek not for "the Church" but for "the whole inhabited world". The ecumenical movement is more than Christian patriarchs kissing. Christian unity means the unity of mankind in finding and obeying God. Tillich can teach us that the Church must not shut its door to celebrate a family reunion while a single child of God remains outside.