Know what is enough
Principle 39 from the Enchiridion
Let real use, not status, tell you where to stop. Once comparison decides what counts as enough, the finish line keeps moving.
Original Passage
The body is to everyone the measure of the possessions proper for it, just as the foot is of the shoe. If, therefore, you stop at this, you will keep the measure; but if you move beyond it, you must necessarily be carried forward, as down a cliff; as in the case of a shoe, if you go beyond its fitness to the foot, it comes first to be gilded, then purple, and then studded with jewels. For to that which once exceeds a due measure, there is no bound.
Modern Interpretation
Epictetus points out our needs have limits, but wanting more does not. Once "enough" depends on comparison or status, the finish line keeps moving.
His example is a shoe. It needs to fit the foot. Once display matters more than use, there is no obvious place to stop.
Comfort and beauty are not the problem. The problem is a desire that never lets us arrive. Knowing what is enough makes trends and social pressure less able to direct us.
In Practice
Here is one everyday case. The device you own still works well. After seeing the new version often enough, though, it suddenly feels inadequate.
Before buying, ask what is actually missing: a function you need, or a better feeling when you compare yours with someone else's?
Reflection Question
Where does "enough" keep moving just as you are about to reach it?