" There is in Descartes an unresolved dualism between what he learnt from contemporary science and the scholasticism that he had been taught at La Flèche. This led him into inconsistencies, but it also made him more rich in fruitful ideas than any completely logical philosopher could have been. Consistency might have made him merely the founder of a new scholasticism, whereas inconsistency made him the source of two important but divergent schools of philosophy. "

― Bertrand Russell , A History of Western Philosophy