Date: c. 1508?

"The mind of the painter should be like a mirror which always takes the colour of the thing that it reflects and which is filled by as many images as there are things placed before it."

— Leonardo di ser Piero da Vinci (1452-1519)

Date: 1532

[The theater of the mind is] "marked with many images, and full of little boxes"

— Camillo, Giulio (1480-1544)

Date: 1793

"It is here that the mind holds its empire, though it is impossible to demonstrate how this is effected, and beyond this point its power ceases."

— Valli, Eusebius (1762-1815)

Date: 1793

"The empire of the mind is extended by experience and practice."

— Valli, Eusebius (1762-1815)