Notes on the Prayer to the Holy Spirit
In this prayer we pray to the Holy Spirit, the third Person of the Holy Trinity.
In it we call the Holy Spirit Heavenly King, because He, as true God, equal to God the Father and God the Son, invisibly reigns over us, is over us and over the whole world. We call Him Comforter, because He comforts us in our sorrows and misfortunes, as He comforted the Apostles on the tenth day after the ascension of Jesus Christ into Heaven.
We call Him Spirit of truth (as our Saviour Himself called Him), because He, as the Holy Spirit, teaches all of us only truth and righteousness, only what is beneficial for us and serves for our salvation.
He is God, He is everywhere present and fills all things with Himself; Who art everywhere present and fillest all things. He, as the ruler of the entire world, sees all things and, where something is needed, He gives it. He is the Treasury of good things, that is, the keeper of all good works, the source of everything good that we could ever need.
We call the Holy Spirit the Giver of life, because all that lives and moves in the world does so by the Holy Spirit. That is, everything receives life from Him; especially people receive spiritual life from Him, holy and eternal life beyond the grave, being cleansed by Him of their sins.
Since the Holy Spirit has such marvelous qualities — is present everywhere, fills all things with His Grace and gives life to all — we turn to Him with special requests: come and dwell in us, that is, constantly abide in us, as in His temple; cleanse us of all impurity, that is, of sin; make us holy, worthy of His abiding within us. Save our souls, O Good One from sins and those punishments which follow for sins, and by this grant us the Kingdom of Heaven.
by Fr. Seraphim Slobodskoy)