Question: What is worth desiring from the world when everything is impermanent ?

I can't even desire Nirvana , because I never get it. [Here](https://suttacentral.net/en/mn1) it states that I can not say Nibbana as mine or me or myself( I can not say I am in state of Nibbana and I can not say Nibbana as mine):

> 
> “He directly knows Nibbāna as Nibbāna. Having directly known Nibbāna
>  as Nibbāna, he should not conceive himself as Nibbāna, he should not
>  conceive himself in Nibbāna, he should not conceive himself apart from
>  Nibbāna, he should not conceive Nibbāna to be ‘mine,’ he should not
>  delight in Nibbāna. Why is that? Because he must fully understand it,
>  I say.
> 
> 
> 

( I am asking this question to understand the depths of knowledge... I am trying not to take delight in asking such questions.Buddha says one should not even take delight in Nibbana.)

Answer: 
You used to desire stuff from the world before you understood the Dhamma.

After you understood the Dhamma, you can and will still desire stuff from the world. The only difference is you do it in accordance with the Middle Way, the Noble Eightfold Path, the five precepts and principles of virtue (sila).

You don't suddenly stop desiring all stuff because they are impermanent. Rather, when you desire stuff, you do so with an understanding that they are all impermanent and suffering.

What is worth desiring? This understanding.
You can want to be strong instead of weak. You can want to be a master instead of victim of circumstances. You can want to learn to control your mind. You can want to help others feel less suffering, in both ways (external and internal help). You can want to know the truth from the myths.

This world is a dream and everything here is like a phantom, but you can use it as gym to practice. Even if impermanent, this is good exercise.