Moreover, we ought to cultivate an easy temper, and not become over fond of the lot which fate has assigned to us, but transfer ourselves to whatever other condition chance may lead us to, and fear no alteration, either in our purposes or our position in life, provided that we do not become subject to caprice, which of all vices is the most hostile to repose: for obstinacy, from which Fortune often wrings some concession, must needs be anxious and unhappy, but caprice, which can never restrain itself, must be more so. Both of these qualities, both that of altering nothing, and that of being dissatisfied with everything, are energies to repose. The mind ought in all cases to be called away from the contemplation of external things to that of itself: let it confide in itself, rejoice in itself, admire its own works; avoid as far as may be those of others, and devote itself to itself; let it not feel losses, and put a good construction even upon misfortunes.