Faith is Seeing the Glory of Christ: the Manifestation of Those Divine Excellencies

The essence of faith consists in a due ascription of glory to God, Rom. iv. 20. This we cannot attain unto without the manifestation of those divine excellencies unto us wherein he is glorious. This is done in Christ alone, so as that we may glorify God in a saving and acceptable manner. He who discerns not the glory of divine wisdom, power, goodness, love, and grace, in the person and office of Christ, with the way of the salvation of sinners by him, is an unbeliever. 

Hence the great design of the devil, in the beginning of the preaching of the gospel, was to blind the eyes of men, and fill their minds with prejudices, that they might not behold this glory of his; so the apostle gives an account of his success in this design, 2 Cor. iv. 3, 4, “If our gospel be hid, it is hid unto them that are lost: in whom the god of this world hath blinded the minds of them which believe not, lest the light of the glorious gospel of Christ, who is the image of God, should shine unto them.” By various ways and methods of deceit, to secure the reputation he had got of being “god of this world,” by pretences and appearances of supernatural power and wisdom, he laboured to blind the eyes of men with prejudices against that glorious light of the gospel which proposed the Lord Christ as the only image of God. This blindness, this darkness is cured in them that believe, by the mighty power of God; for God, who commanded the light to shine out of darkness, has irradiated our hearts with the knowledge of the glory of God in the face of Jesus Christ, verse 6, — wherein true saving faith does consist. Under this darkness perished the unbelieving world of Jews and Gentiles: and such is the present condition of all by whom the divine person of Christ is denied; for no mere creature can ever make a perfect representation of God unto us.

John Owen. The Glory of Christ.