Clement of Alexandria — on Rom 10:14-17 (The Stromata Book 2)

“"Lord, who hath believed our report?" Isaiah says. For "faith cometh by hearing, and hearing by the word of God," saith the apostle. "How then shall they call on Him in whom they have not believed? And how shall they believe on Him whom they have not heard? And how shall they hear without a preacher? And how shall they preach except they be sent? As it is written, How beautiful are the feet of those that publish glad tidings of good things!" You see how he brings faith by hearing, and the preaching of the apostles, up to the word of the Lord, and to the Son of God. We do not yet understand the word of the Lord to be demonstration.”