What is worth desiring from the world?

What is worth desiring from the world when everything is impermanent ? I can't even desire Nirvana , because I never get it. Here 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.)