This is also Paul’s teaching in his second letter to the Corinthians: The grace of our Lord Jesus Christ and the love of God and the fellowship of the Holy Spirit be with you all. For grace and the gift of the Trinity are given by the Father through the Son in the Holy Spirit. Just as grace is given from the Father through the Son, so there could be no communication of the gift to us except in the Holy Spirit. But when we share in the Spirit, we possess the love of the Father, the grace of the Son and the fellowship of the Spirit himself.
St. Athanasius of Alexandria, First Letter to Serapion 28-30, as found in the Office of Readings.
