“For as God, the Creator of the world, pours forth upon us the brightness of the sun, and gives us eyes to receive it, so, as the Redeemer, in the person of His Son, He shines forth, indeed, upon us by His gospel, but, as we are blind, that would be in vain, if He did not at the same time enlighten our understandings by His Spirit. His meaning, therefore, is, that God has, by His Spirit, opened the eyes of our understandings, so as to make them capable of receiving the light of the gospel.
John Calvin, Calvin’s Commentaries, vol. 20, p. 200
(HT: John Fonville)