In his courageous passion for truth, he resolved to reject, Provisorily at least, all the ideas that hitherto he had received without controlling them, firmly decided not to admit any but those which, after a serious examination, might appear to him evident.
"Lectures on the true, the beautiful and the good"
Victor Cousin
But he perceived that there was one thing which he could not reject, even Provisorily, in his universal doubt,-that thing was the existence itself of his doubt, that is to say, of his thought; for although all the rest might be only an illusion, this fact, that he thought, could not be an illusion.
"Lectures on the true, the beautiful and the good"
Victor Cousin