...prior to the parousia this sanctification and deification remain incomplete and preliminary, for the action of the Holy spirit ends with the parousia; the whole power of the Pentecost is revealed to the world. The world is sanctified, deified, and glorified by the power of the Holy Spirit, and the parousia arrives by virtue of this action of the Pentecost. It is impossible to say what comes before and what after, for this is a single act that occurs both in heaven and on earth, signifying the end of God's kenosis and the beginning of the world's deification. The Father sends the Son into the world and, secondarily as it were, He sends with Him the Holy Spirit for the joint accomplishment of the parousia and the transfiguration of the world. The Son wills again to carry out the will of the Father, this time by a conclusive and universal act, in order to accomplish the salvation of the world and to "unite the things of earth with those of heaven", as the liturgical hymn says.