With this first theoretical meaning of the word philosophy a second was very early associated. The development of Greek philosophy came at the time when the naive religious and ethical consciousness was in process of disintegration. This not only made the questions as to man's vocation and tasks more and more important for scientific investigation (of. Below, Part I. Ch. But also made instruction in the right conduct of life appear as an essential aim, and finally as the main content of philosophy or science. Thus philosophy in the Hellenistic period received the practical meaning of an art of life, based upon scientific principles,'