Hippolytus of Rome

This is the Spirit that at the beginning "moved upon the thee of the waters; " by whom the world moves; by whom creation consists, and all things have life; who also wrought mightily in the prophets, and descended in flight upon Christ. This is the Spirit that was given to the apostles in the form of fiery tongues. This is the Spirit that David sought when he said, "Create in me a clean heart, O God, and renew a right spirit within me." Of this Spirit Gabriel also spoke to the Virgin, "The Holy Ghost shall come upon thee, and the power of the Highest shall overshadow thee." By this Spirit Peter spake that blessed word, "Thou art the Christ, the Son of the living God." By this Spirit the rock of the Church was stablished. This is the Spirit, the Comforter, that is sent because of thee, that He may show thee to be the Son of God.