It is not uncommon in the talks and writings of Chiara Lubich to find explicit references to unity, a particular aspect of her spirituality, referring to the prayer of Jesus in chapter 17 of John’s Gospel. In the 1940s, reading by candlelight, in an air raid shelter in Trent in the midst of the war, the words that Jesus said to his disciples after the last supper were understood, one after the other, in a very new light. “Although the passage wasn’t an easy one for us, we felt that not only did we have a certain understanding of it but that we had been born for it and that it was the Magna Charta of the Movement which was coming to life. We felt that we had been called to make a contribution to the fulfilment of the unity Jesus spoke about in his testament” [2] .But unity, what is it, who is it? We know the answer. It’s certainly not a simple point of our spirituality. Unity brings into our midst a person, a person who is God Himself. Unity is Jesus among us. A Father of the Church says that unity is that “accord” between several people in thought and in sentiment, so as to arrive at that concord which “unites and contains the Son of God” (Origen, Comm. in Matth., XIV, 1s.: PG 13, 1187). And His presence — we can bear witness to this— is the source of profound happiness: Jesus among us is the fullness of joy; He makes our lives and the lives of all those who live unity an unceasing celebration [3].Although at first Chiara’s spiritual and practical action seemed to be limited to that town in northern Italy, her influence soon spread to various other regions and crossed national borders. While she initially understood the impact of her charism as limited to reviving unity among Catholics, later, due to providential circumstances, she understood the prayer of Jesus to the Father in its ecumenical meaning and far beyond. “And like a river, unity has spread its waters through various tributaries: universal fraternity, the desire for a “united world,” dialogue with faithful of non-Christian religions and with people of non-religious beliefs”[4].