Epictetus
When you receive an impression of some pleasure,
as with others, watch yourself, not to be carried off by it;
however let it wait upon your business,
and get some delay for yourself.
Next remember both the times,
when you will enjoy the pleasure,
and when having enjoyed it
later you will repent and reproach yourself;
and against these refraining
how much you will be glad and commend yourself.
But if an opportunity appears to you
to engage in the action,
be sure you are not overcome
by its softness and pleasure and attraction;
but set against it, how much better is the awareness
for yourself to have won a victory over it.