The third person of the Holy Trinity, who is distinct from the Father and the Son but one in being, coequal, and coeternal with them, because, like them, he is in the fullest sense God. The Holy Spirit proceeds not only from the Father but also from the Son as from a single principle, through what is called a single spiration. He is the personal infinite term of the eternal act of mutual love of the Father and the Son; hence his name of Spirit, as the issue or term of God's eternal love or act of will. He is also called the Spirit of Truth, the Creator Spirit, the Sanctifier, as the gifts of revelation, of creation (and re-creation), and of sanctification are the outpourings of God's love, and therefore appropriated to the Spirit of Love, though whatever God does outside the Trinity (in the world of creatures) belongs to the common or united action of the three divine persons. He is called Dove, because it was in this form that he descended visibly upon Christ in the Jordan (Mark 1:10).