For some natures, changing their opinions is just as much a requirement of cleanliness as changing their clothes: for others, however, it is merely a requirement of vanity.
You say 'I' and you are proud of this word. But greater than this- although you will not believe in it - is your body and its great intelligence, which does not say 'I' but performs 'I'.
Doing ill to those on whom we have to make our power felt; for pain is a far more sensitive means for that purpose than pleasure: pain always asks concerning the cause, while pleasure is inclined to keep within itself and not look backward.
I too have been in the underworld, as was Odysseus, and I will often be there again; not only sheep have I sacrificed so as to beable to speak with a few dead souls, but neither have I spared my own blood as well.
One sticks to an opinion because he prides himself on having come to it on his own, and another because he has taken great pains to learn it and is proud to have grasped it: and so both do so out of vanity.
However closely people are attached to one another, their mutual horizon nonetheless includes all four compass directions, and nowand again they notice it.