Date: w. 1628, published in 1684, 1701

"Again, the pen as a whole does not move in exactly the same way as its lower end; on the contrary, the upper part of the pen seems to have a quite different and opposite movement. This enables us to understand how all the movements of other animals can come about, even though we refuse to allow ...

— Descartes, René (1596-1650)

Date: w. 1628, published in 1684, 1701

"In all these functions the cognitive power is sometimes passive, sometimes active; sometimes resembling the seal, sometimes the wax."

— Descartes, René (1596-1650)

Date: w. 1628, published in 1684, 1701

"Moreover, as we said, we should not contemplate, in one and the same visual or mental gaze, more than two of the innumerable different dimensions which it is possible to depict in the imagination."

— Descartes, René (1596-1650)

Date: w. 1628, published in 1684, 1701

"But I am convinced that certain primary seeds of truth naturally implanted in human minds thrived vigorously in that unsophisticated and innocent age - seeds which have been stifled in us through our constantly reading and hearing all sorts of errors"

— Descartes, René (1596-1650)

Date: w. 1628, published in 1684, 1701

"So the same light of the mind which enabled them to see (albeit without knowing why) that virtue is preferable to pleasure, the good preferable to the useful, also enabled them to grasp true ideas in philosophy and mathematics, although they were not yet able fully to master such sciences"

— Descartes, René (1596-1650)

Date: w. 1628, published in 1684, 1701

"It should not be thought that I have a mere analogy in mind here: we must think of the external shape of the sentient body as being really changed by the object in exactly the same way as the shape of the surface of the wax is altered by the seal."

— Descartes, René (1596-1650)

Date: w. 1628, published in 1684, 1701

"Secondly, when an external sense organ is stimulated by an object, the figure which it receives is conveyed at one and the same moment to another part of the body known as the 'common' sense, without any entity really passing from the one to the other. In exactly the same way I understand that w...

— Descartes, René (1596-1650)