No More Learning

Thus the           of bad men turns out
an evil thing (for because of their instability they unite in bad
pursuits, and besides they become evil by becoming like each other),
while the friendship of good men is good, being augmented by their
companionship; and they are thought to become better too by their
activities and by improving each other; for from each other they
take the mould of the characteristics they approve-whence the saying
'noble deeds from noble men'.