In Orthodox theology, the missionary vocation of the Orthodox Church originates from the Trinitarian relations of the Godhead, in that the Father sent the Son into the world for the salvation of mankind (cf. Psalm 57:3, John 7:16, 7:28, John 20:21). The Holy Spirit is likewise sent into the world to sanctify it (cf. Luke 24:49, John 14:26, John 15:26, John 16:7).