A scripture on Christian spirituality:
Now the Lord is the Spirit, and where the Spirit of the Lord is, there is freedom. And we, who with unveiled faces all reflect the Lord’s glory, are being transformed into his likeness with ever-increasing glory, which comes from the Lord, who is the Spirit.(2 Corinthians 3:17-18)
From Article 18 of the Confession of Faith from a Mennonite Perspective:
We believe that to be a disciple of Jesus is to know life in the Spirit. As we experience relationship with God, the life, death, and resurrection of Jesus Christ take shape in us, and we grow in the image of Christ. In individual and communal worship, the Holy Spirit is present, leading us deeper into the wisdom of God.