Rene Descartes — "For the mind is not nourished by anything but truth."

"I desire to live, and to continue the studies I have begun, but I have not found anyone who could tell me where to go."

"I perceived it was possible to arrive at knowledge highly useful in life; and that, instead of the speculative philosophy usually taught in the Schools, we might find a practical, by means of which, k…"

"The soul is not in the body as a pilot in his ship, but intimately joined and intermingled with it."

"The greatest good is the knowledge of truth, and the greatest evil is error."

"The chief cause of human error is the confused nature of our perceptions."