Date: 1159

"What is more remarkable, every one of us carries in his heart a book of knowledge, opened by the exercise of reason."

— John of Salisbury (c. 1115-1180)

Date: 1159

"In this [book of reason] are portrayed not only the forms of all visible things and nature in general; the invisible things of the Fabricator of all things are also written down by the very hand of God."

— John of Salisbury (c. 1115-1180)

Date: w. c. 1210

"The measuring line of his mind lays out the work, and he mentally outlines the successive steps in a definite order."

— Vinsauf, Geoffrey of [called Galfridus Anglicus] (fl. 1208-1213)

Date: w. c. 1210

"The mind's hand shapes the entire house before the body's hand builds it."

— Vinsauf, Geoffrey of [called Galfridus Anglicus] (fl. 1208-1213)

Date: w. c. 1210

"Let the mind's interior compass first circle the whole extent of the material."

— Vinsauf, Geoffrey of [called Galfridus Anglicus] (fl. 1208-1213)

Date: w. c. 1210

"As a prudent workman, construct the whole fabric within the mind's citadel; let it exist in the mind before it is on the lips."

— Vinsauf, Geoffrey of [called Galfridus Anglicus] (fl. 1208-1213)

Date: 1257

"Accordingly, there are two books, one written within, and that is [inscribed by] God's eternal Art and Wisdom; the other written without, and that is the perceptible world"

— St. Bonaventure [born Giovanni di Fidanza] (1217-1274)

Date: 1257

"Now, the woman [Eve], hearing in the external way the serpent's suggestion, failed to read the internal book that was open and quite legible to the right judgment of reason."

— St. Bonaventure [born Giovanni di Fidanza] (1217-1274)

Date: 1257

"By subject, I mean obedient to the soul without rebellion, reproducing and reproducible without lust, functioning without defect, wholly exempt from the changes of decay, impervious to death."

— St. Bonaventure [born Giovanni di Fidanza] (1217-1274)

Date: 1257

"For this triple vision, man was endowed with a triple eye, as explained by Hugh of St. Victor: the eye of flesh, of reason, and of contemplation; the eye of flesh, to see the world and what it contains; the eye of reason, to see the soul and what it contains; the eye of contemplation, to see God...

— St. Bonaventure [born Giovanni di Fidanza] (1217-1274)