Rene Descartes Philosophy Quotations

Dubito ergo cogito; cogito ergo sum.(I doubt, therefore I think; I think therefore I am)

In philosophy, when we make use of false principles, we depart the farther from the knowledge of truth and wisdom exactly in proportion to the care with which we cultivate them, and apply ourselves to the deduction of diverse consequences from them, thinking that we are philosophizing well, while we are only departing the farther from the truth; from which it must be inferred that they who have learned the least of all that has been hitherto distinguished by the name of philosophy are the most fitted for the apprehension of truth.

Science is practical philosophy.

I have concluded the evident existence of God, and that my existence depends entirely on God in all the moments of my life, that I do not think that the human spirit may know anything with greater evidence and certitude.

One cannot conceive anything so strange and so implausible that it has not already been said by one philosopher or another.