When I review Xerxes' achievements, I praise him, not for having yoked the Hellespont, but for having crossed it. But I can see that Nero will neither sail through the Isthmus nor complete his digging.
As soldiers need not only courage but tactics also, so does a philosopher need not only courage and philosophy but discernment also, to tell what his right time of dying is - so that he neither seek it nor flee it.
I feel friendship towards philosophers, but towards sophists, teachers of literature, or any other such kind of godforsaken people, I neither feel friendship now, nor may I ever do so in the future.