Since periods of great change, such as the present one, come so rarely in human history, it is up to each of us to make the best use of our time to help create a happier world.
And tell him it's quite true that the best of the philosophers are of no use to their fellows; but that he should blame, not the philosophers, but those who fail to make use of them.
No use slaving for me and then saying you want to be cared for: who cares for a slave? If you come back, come back for the sake of good fellowship; for you’ll get nothing else.