1. And, first, it is not barely the faith of a heathen. Now, God requireth of a heathen to believe, “that God is; that he is a rewarder of them that diligently seek him;” and that he is to be sought by glorifying him as God, by giving him thanks for all things, and by a careful practice of moral virtue, of justice, mercy, and truth, toward their fellow creatures. A Greek or Roman, therefore, yea, a Scythian or Indian, was without excuse if he did not believe thus much: the being and attributes of God, a future state of reward and punishment, and the obligatory nature of moral virtue. For this is barely the faith of a heathen.

2. Nor, secondly, is it the faith of a devil, though this goes much farther than that of a heathen. For the devil believes, not only that there is a wise and powerful God, gracious to reward, and just to punish; but also, that Jesus is the Son of God, the Christ, the Saviour of the world. So we find him declaring, in express terms, “I know Thee who Thou art; the Holy One of God” (Luke 4:34). Nor can we doubt but that unhappy spirit believes all those words which came out of the mouth of the Holy One, yea, and whatsoever else was written by those holy men of old, of two of whom he was compelled to give that glorious testimony, “These men are the servants of the most high God, who show unto you the way of salvation.” Thus much, then, the great enemy of God and man believes, and trembles in believing, –that God was made manifest in the flesh; that he will “tread all enemies under his feet;” and that “all Scripture was given by inspiration of God.” Thus far goeth the faith of a devil.

3. Thirdly. The faith through which we are saved, in that sense of the word which will hereafter be explained, is not barely that which the Apostles themselves had while Christ was yet upon earth; though they so believed on him as to “leave all and follow him;” although they had then power to work miracles, to “heal all manner of sickness, and all manner of disease;” yea, they had then “power and authority over all devils;” and, which is beyond all this, were sent by their Master to “preach the kingdom of God.” –John Wesley, “Salvation by Faith” 1.1-3