Depiction of Holy Spirit as a dove, by Gian Lorenzo Bernini, in the apse of Saint Peter's Basilica
The Holy Spirit (also known as the Holy Ghost) is the third person of the Trinity. It was the Holy Spirit that inspired the Old Testament prophets and the New Testament apostles. Most churches of Western Christianity affirm that the Holy Spirit proceeds from both God the Father and God the Son. Most churches of Eastern Christianity affirm that the Holy Spirit proceeds from God the Father alone. This doctrinal difference is one of the factors that led to the Great Schism.
Among Lutherans, it is believed that faith is a gift of the Holy Spirit. Lutherans believe that individuals are born again and receive the Holy Spirit through baptism.
According to Paul, among the fruits of the Holy Spirit are love, joy, peace, patience, kindness, goodness, faithfulness, gentleness, and self-control (Galatians 5:22-23).
Holy Spirit descended on Jesus Christ from heaven when he was on Earth, and a voice from heaven said "You are my beloved Son; with you I am well pleased." (Luke 3:22)
Now, each one of us has the Holy Spirit inside of us, which inspires us to do good. (1 Cor. 6:19)