The Trinity…

From the Gospel of Matthew (Mt. 28: 16-20): The eleven disciples went to Galilee, to the mountain to which Jesus had ordered them. When they all saw Him (Jesus), they worshiped, but they doubted. Then Jesus approached and said to them, “All power in heaven and on earth has been given to Me. Go, therefore, & make disciples of all nations, baptizing them in the name of the Father, & of the Son, & of the Holy Spirit, teaching them to observe all that I have commanded you. And behold, I am with you always, until the end of the age.”

The Celebration of the Feast of the Holy Trinity: What we believe & hold to be true:
From a letter by St. Athanasius: In the Church, one God is preached, one God who is above all things & through all things & in all things. God is above all things as Father, for he is principle and source; he is through all things through the Word (Jesus Christ); and he is in all things in the Holy Spirit… Writing to the Corinthians about spiritual matters, Paul traces all reality back to one God, the Father, saying: Now there are varieties of gifts, but the same Spirit; and there are varieties of service but the same Lord; and there are varieties of working, but it is the same God who inspires them all in everyone.

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.