Date: 1605?

"Within thine eyes (the Mirrors of my minde) / Mine eies behold themselues, wherein they see / (As through a Glasse) what in my Soule I find; / And so my Soules right shape I see in thee."

— Davies, John (1564/5-1618)

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)