This morning in his homily on the feast of Pentecost, Pope Francis spoke at length about the work of the Holy Spirit.
The Holy Spirit does not bring only harmony within us but also among us. He makes us Church, building different parts into one harmonious edifice. Saint Paul explains this well when, speaking of the Church, he often repeats a single word, “variety”: varieties of gifts, varieties of services, varieties of activities” (1 Cor 12:4-6). We differ in the variety of our qualities and gifts. The Holy Spirit distributes them creatively so that they are not all identical. On the basis of this variety, he builds unity. From the beginning of creation, he has done this. Because he is a specialist in changing chaos into cosmos, in creating harmony.
He also spoke about how what it means to live in the Spirit:
Repaying evil for evil, passing from victims to aggressors, is no way to go through life. Those who live by the Spirit, however, bring peace where there is discord, concord where there is conflict. Those who are spiritual repay evil with good. They respond to arrogance with meekness, to malice with goodness, to shouting with silence, to gossip with prayer, to defeatism with encouragement.
To be spiritual, to savor the harmony of the Spirit, we need to adopt his way of seeing things. Then everything changes: with the Spirit, the Church is the holy People of God, the mission is the spread of joy, as others become our brothers and sisters, all loved by the same Father. Without the Spirit, though, the Church becomes an organization, her mission becomes propaganda, her communion an exertion. The Spirit is the first and last need of the Church.