Enchiridion 34

When you get an external impression of some pleasure, guard yourself, as with impressions in general, against being carried away by it; nay, let the matter wait upon your leisure, and give yourself a little delay. Next think of the two periods of time, first, that in which you will enjoy your pleasure, and second, that in which, after the enjoyment is over, you will later repent and revile your own self; and set over against these two periods of time how much joy and self-satisfaction you will get if you refrain. However, if you feel that a suitable occasion has arisen to do the deed, be careful not to allow its enticement, and sweetness, and attractiveness to overcome you; but set over against all this the thought, how much better is the consciousness of having won a victory over it.

Epictetus, Enchiridion 34, translated by W. A. Oldfather

If you have received the impression (φαντασίαν) of any pleasure, guard yourself against being carried away by it; but let the thing wait for you, and allow yourself a certain delay on your own part. Then think of both times, of the time when you will enjoy the pleasure, and of the time after the enjoyment of the pleasure when you will repent and will reproach yourself. And set against these things how you will rejoice if you have abstained from the pleasure, and how you will commend yourself. But if it seem to you seasonable to undertake (do) the thing, take care that the charm of it, and the pleasure, and the attraction of it shall not conquer you: but set on the other side the consideration how much better it is to be conscious that you have gained this victory.

Epictetus, Enchiridion 34, translated by George Long

When you imagine some pleasure, beware that it does not carry you away, like other imaginations. Wait a while, and give yourself pause. Next remember two things: how long you will enjoy the pleasure, and also how long you will afterwards repent and revile yourself. And set on the other side the joy and self-satisfaction you will feel if you refrain. And if the moment seems come to realize it, take heed that you be not overcome by the winning sweetness and attraction of it; set in the other scale the thought how much better is the conscious- ness of having vanquished it.

Epictetus, Enchiridion 34, translated by P. E. Matheson