text: It is a useful fact that you wish to know, one which is essential to him who hastens after wisdom – namely, the parts of philosophy and the division of its huge bulk into separate members. For by studying the parts we can be brought more easily to understand the whole. I only wish that philosophy might come before our eyes in all her unity, just as the whole expanse of the firmament is spread out for us to gaze upon! It would be a sight closely resembling that of the firmament. For then surely philosophy would ravish all mortals with love for her; we should abandon all those things which, in our ignorance of what is great, we believe to be great. Inasmuch, however, as this cannot fall to our lot, we must view philosophy just as men gaze upon the secrets of the firmament.