Almighty and most merciful Father, who didst give thine only Son for the sins of the whole world, and didst send thy Holy Spirit that the Church should be his witness in all the earth: Pour out thy blessing upon those taking part in this campaign, and open the hearts of the hearers to receive thy message delivered by them; so that a deeper interest in missionary work may be aroused at home, and thy kingdom be advanced overseas; for the honour of Jesus Christ our Lord.