§788
Creed › … › Paragraph 2. the Church - People of God, Body of Christ, Temple of the Holy Spirit
The Church is communion with Jesus
When his visible presence was taken from them, Jesus did not leave his disciples orphans. He promised to remain with them until the end of time; he sent them his Spirit. As a result communion with Jesus has become, in a way, more intense: "By communicating his Spirit, Christ mystically constitutes as his body those brothers of his who are called together from every nation."
Source: Catechism of the Catholic Church (Vatican.va)