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.