Except that we perceive does not depend on the nature itself of the object ... but the comparison produced with a second object
Like so that the value of an object and a product (imagine well luxuries, etc) ... not dependent on the product itself! But that with which it is compared!
Thus, for a life of luxury is pleasant! It should taste the poor life from time to time!
And this explains why we tend to want more and more
For a different object that leans toward the best ... will give pleasure to the individual.
Conclusion: what is ready for an object that makes us happy is not from himself! But the comparison is being done with the product previously used!
If this comparison is no longer because the product has not been used before ... the product becomes bland and tasteless!
Moral of the story: If you want to experience the pleasure of a life of luxury .... turn around occasionally to extreme poverty and living the life you lead now appear succulent