However it was more than a ghost, or a vision. He ate a fish, and let someone touch him. The Holy Spirit and the Christian life I believe in the Holy Spirit, the holy catholic Church, the communion of saints, the forgiveness of sins, the resurrection of the body, and the life everlasting. The Holy Spirit is the bond that unites us with God. God is personal, so the Holy Spirit is a personal presence.
Christians live in community.
Jesus described himself as a vine, with us as the branches. It is not possible to be united with him without also being united with other Christians. The motivating force behind the Christian life is love. Since love is a personal relationship, there's no way to grow in love other than to be with others. The Creed speaks of the Church as holy and catholic.