Discourses: Book 3 24 : 14
What, then, is the proper discipline for this? In the first place, the highest and principal discipline, and one that stands at the very gates of the subject, is this: Whenever you grow attached to something, do not act as though it were one of those things that cannot be taken away, but as though it were something like a jar or a crystal goblet, so that when it breaks you will remember what it was like, and not be troubled. So too in life; if you kiss your child, your brother, your friend, never allow your fancy free rein, nor your exuberant spirits to go as far as they like, but hold them back, stop them, just like those who stand behind generals when they ride in triumph, and keep reminding them that they are mortal. In such fashion do you too remind yourself that the object of your love is mortal; it is not one of your own possessions; it has been given you for the present, not inseparably nor for ever, but like a fig, or a cluster of grapes, at a fixed season of the year, and that if you hanker for it in the winter, you are a fool. If in this way you long for your son, or your friend, at a time when he is not given to you, rest assured that you are hankering for a fig in winter-time. For as winter-time is to a fig, so is every state of affairs, which arises out of the universe, in relation to the things which are destroyed in accordance with that same state of affairs.