No trace of substance remains in us unchanged. we live in the midst of a uninterrupted current of relations which condition our existence at every instant. We have no possibility of speaking of our self, our being. The Buddhists can't follow Descartes in his famous "ergo." Nothing naturally follows from thought to being, since both are elements of the same changing stream. Instead of affirming, "I think therefore I am," we could say, at most, "I think, therefore I think," or else, as Nietzsche says, 'Something is thinking."
--HH the XIV Dalai Lama, Violence and Compassion
This quote courtesy of http://groups.yahoo.com/group/ShangpaNY/