58. In the stony hearts of the Gentiles God opened rivers of preaching. — That is, in the hard hearts of the Gentiles He opened rivers of preaching, even as it is said through the prophet concerning the dryness of the Gentiles to be watered: 'He turned the desert into pools of water, and the dry land into water-springs' (Ps. CVII, 35). And in the Gospel the Lord promises, saying: 'He that believeth on me, as the Scripture hath said, out of his belly shall flow rivers of living water' (John VII, 38). Which promise we then heard, and even now we see fulfilled. For behold, in the holy preachers, and those not born of Judaea, throughout the whole Church spread over all the world, the streams of the heavenly commandments flow abundantly from the mouth of the Gentiles.