I will content myself with showing that none of these elements, in the sense in which the mathematician takes them, can be achieved or imitated by philosophyjb and that by means of his method the mathematician can build nothing in philosophy except houses of cards, while by means of his method the philosopher can produce nothing in mathematics but idle chatter, while philosophy consists precisely in knowing its bounds, and even the mathematician, if his talent is not already bounded by nature and limited to his specialty, can neither reject its warnings nor disregard them.