.
The greatest minds, as they are capable of the highest excellencies, are open likewise to the greatest aberrations.
~ in Discourse On Method
No opinion, however absurd and incredible, can be imagined, which has not been maintained by some one of the philosophers.
~ in Discourse On Method
Except our own thoughts, there is nothing absolutely in our power.
~ in Discourse On Method
What is there, then, that can be esteemed true? Perhaps this only that there is absolutely nothing certain.
~ in Meditationes de prima philosophia
The reading of all good books is like conversation with the finest men of past centuries.
If you would be a real seeker after truth, it is necessary that at least once in you life you doubt, as far as possible, all things.
It is not enough to have a good mind. The main thing is to use it well.
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I contributed the following article to the 
. edited by John Powell (Westport, CT: Greenwood Press, 2001).
