Date: 1641

A geometrical argument fills the mind and allows one to see everything at a single glance

— Mersenne, Marin (1588-1648)

Date: 1641

A calm mind, free from the hurly-burly of external things, may fix its gaze on itself

— Arnauld, Antoine (1612-1694)

Date: 1641

"Now if we are to become aware of something, it is necessary for the thing to act on the cognitive faculty by transmitting its semblance to the faculty or by informing the faculty with its semblance. Hence it seems clear that the faculty itself, not being outside itself, cannot transmit a semblan...

— Gassendi, Pierre (1592-1655)

Date: 1705

"Natalis Comes says, The Genii or Daemons present us with the Species or Images of those things they would perswade us to, as in a Glass; on which Images, when our Soul privately looks, those things come into our Mind; which, if consider'd with Reason, give us a right determination of Mind."

— Beaumont, John (c.1640-1731)

Date: 1737, 1743

"The best way to prove the clearness of our mind, is by shewing its Faults; as when a Stream discovers the Dirt at the bottom, it convinceth us of the transparency and purity of the Water."

— Pope, Alexander (1688-1744)