Calvin on Scripture

"Just as old or bleary-eyed men and those with weak vision, if you thrust before them a most beautiful volume, even if they recognize it to be some sort of writing, yet can scarcely construe two words, but with the aid of spectacles will begin to read distinctly; so Scripture, gathering up the otherwise confused knowledge of God in our minds, having dispersed our dullness, clearly shows us the true God. This, therefore, is a special gift, where God, to instruct the church, not merely uses mute teachers but also opens His own most hallowed lips. Not only does He teach the elect to look upon a god, but also shows Himself as the God upon whom they are to look. He has from the beginning maintained this plan for His Church, so that besides these common proofs He also put forth His Word, which is a more direct and more certain mark whereby He is to be recognized." Institutes, 1.6.1