For, while there is a cause of health and of good condition, and the objects of mathematics have first principles and elements and causes, and in general every science which is ratiocinative or at all involves reasoning deals with causes and principles, more or less precise, all these sciences mark off some particular being-some genus, and inquire into this, but not into being simply nor qua being, nor do they offer any discussion of the essence of the things of which they treat;
Izan ere, badago osasunaren eta ongizatearen kausaren bat, eta errealitate matematikoen printzipioak, 5) osagaiak eta kausak ere badira;