Descartes Quotes
All the men who are now called discoverers, in every matter ruled by thought, have been men versed in the minds of their predecessors, and learned in what had been before them. There is not one exception. I do not say that every man has made direct acquantance with the whole of his mental ancestry... But... it is remarkable how many of the greatest names in all departments of knowledge have been real antiquaries in their several subjects.
I may cite among those... in science, Aristotle, Plato, Ptolemy, Euclid, Archimedes, Roger Bacon, Copernicus, Francis Bacon, Ramus, Tycho Brahe, Galileo, Napier, Descartes, Leibnitz, Newton, Locke.
Augustus De Morgan
What is philosophy? This is a notoriously difficult question. One of the easiest ways of answering it is to say that philosophy is what philosophers do, and then point to the writings of Plato, Aristotle, Descartes, Hume, Kant, Russell, Wittgenstein, Sartre, and other famous philosophers. However, this answer is unlikely to be of much use to you if you are just beginning the subject, as you probably won't have read anything by these writers.
Nigel Warburton
That Descartes' Cartesian way of looking at animals, like they're machines... It is outdated, and quite frankly, 100% insane. Because, if we all understand that animals use their eyes to see, ears to hear, noses to smell, mouths to eat, legs to walk, feathers to fly, fins to swim, genitalia to procreate, bowels to defecate.. I'm always perplexed that most people don't believe that they can also use their brains to think, feel, be rational, be aware and be self-aware! Am I supposed to believe, that every body part of an animal functions just like it's supposed to, except the brain?
Gary Yourofsky
And then, a little Jew, with a long nose and a pale complexion, Poor but satisfied, pensive and reserved, A subtle but hollow spirit, less read than celebrated, Hidden under the mantle of Descartes, his mentor, Walking with measured steps, comes close to the great being: Excuse me, he says, addressing him in a whisper, But I think, just between us, that you do not exist at all.
Baruch Spinoza