Calvin’s a priori of Scripture

Now, in describing the world as a mirror in which we ought to behold God, I would not be understood to assert, either that our eyes are sufficiently clear-sighted to discern what the fabric of heaven and earth represents, or that the knowledge to be hence attained is sufficient for salvation. . . . For the Scripture as our guide and teacher, he not only makes those things plain which would otherwise escape our notice, but almost compels us to behold them; as if he had assisted our dull sight with spectacles.

- From “Argument” in Calvin’s commentary on the book of Genesis.