First stands the question of the stage of development reached by Hellenism, and we may test this by its intellectual life as represented by science and philosophy, at the time when the oriental off-shoot shows a definite line of separation. English education, largely dominated by the principles learned at the renascence, is inclined to treat philosophy as coming to an end with Aristotle and beginning again with Descartes after a long blank during which there lived and worked some degenerate descendants of the ancients who hardly need serious consideration. But this position violates the primary canon of history which postulates that all life is continuous, the life of the social community as well as the physical life of an organic body: and life must be a perpetual series of causes and results, so that each event can only be explained by the cause which went before, and can only be fully understood in the light of the result which follows after. What we call the “middle ages” had an important place in the evolution of our own cultural condition, and owed much to the transmitted culture which came round from ancient Hellenism through Syriac, Arabic, and Hebrew media. But this culture came as a living thing with an unbroken and continuous development from what we call the “classic” age. As the philosophy of the great classic schools passes down to these later periods it shows great modifications, but this alteration is itself a proof of life. Philosophy, like religion, in so far as it has a real vitality, must change and adapt itself to altered conditions and new requirements: it can remain pure and true to its past only in so far as its life is artificial and unreal, lived in an academic atmosphere far removed from the life of the community at large. In such an unnatural atmosphere no doubt, it is possible for a religion or a philosophy to live perfectly pure and uncorrupt, but it is certainly not an ideal life: in real life there are bound to be introduced many unworthy elements and some which can only be described as actually corrupt. So it is inevitable that as a religion or a philosophy lives and really fulfils its proper functions it has to pass through many changes. Of course the same holds good for all other forms of culture: it may be true that a country is happy if it has no history, but it is the placid happiness of vegetable life, not the enjoyment of the higher functions of rational being.