Date: 1637

"Now a painter cannot represent all the different sides of a solid body equally well on his flat canvas, and so he chooses one of the principal ones, sets it facing the light, and shades the others so as to make them stand out only when viewed from the perspective of the chosen side. In just the ...

— Descartes, René (1596-1650)

Date: 1637

"Their [philosopher's] sole reason for positing such images was that they saw how easily a picture can stimulate our mind to conceive the objects depicted in it, and so it seemed to them that, in the same way, the mind must be stimulated, by little pictures formed in our head, to conceive the obj...

— Descartes, René (1596-1650)

Date: 1669

"Eloquence is a painting of thought; and thus those who, after having painted it, add something more, make a picture instead of a portrait."

— Pascal, Blaise (1623-1662)