O ye who've learnt the doctrines of the Porch And have committed to your books divine The best of human learning-, teaching men That the mind's virtue is the only good ! She only it is who keeps the lives of men And cities, — safer than high gates and M-alls. But those who place their happiness in pleasure Are led by the least worthy of the Muses. We have ourselves mentioned the manner of Zeno's death in the Pammetros (a collection of poems in various metres) : The story goes that Zeno of Citium after enduring many hardships by reason of old age was set free, some say by ceasing to take food ; others say that once when he had tripped he beat with his hand upon the earth and cried, " I come of my own accord ; why then call me ? " ° For there are some who hold this to have been the manner of his death. So much then concerning his death. Demetrius the Magnesian, in his work on Men of the Same Name, says of him : his father, Mnaseas, being a merchant often went to Athens and brought away many books about Socrates for Zeno while still a boy. Hence he had been well trained even before he left his native place. And thus it came about that on his arrival at Athens he attached himself to Crates. And it seems, he adds, that, when the rest were at a loss how to express their views, Zeno framed a definition of the end. They say that he was in the habit of swearing by " capers " just as Socrates used to swear by " the dog." Some there are, and among them Cassius the Sceptic and his disciples, who accuse Zeno at length. Their first count is that in the beginning of his Republic he