Hazrat said that a human being must ponder about how long is he going to live in this world. Would he live in it for a day, a month, or a year? The greatest scientist, the greatest philosopher, the mightiest king can not say  with certainty how much longer he has got to live. And yet human beings are striving all the time to gather more wealth and are spending every waking moment to earn more and more of it. But the moment their time on this earth is up they would leave everything here and would not take a single thing to the next world.

That is why this verse of the Quran:

 "وما الحیوٰة الدنیا الّا متاع الغرور" (سورہ حدید ۲۰)

is telling us that this worldly life is a trap. Do not fall into this trap to the extent that it makes you forget about the life hereafter. Do use what this world offers you but do not let it make you blind to the Aakhirah. Once a person becomes fully cognisant of this fact, then regardless of whether they have bungalows, or mills, or a big bank balance, if they are not in love with their material possessions then they have the attribute of Zuhud (زہد). 

Imam Ghazali RA used to say that the greatest loser is the person who did not make any money and is poor, but his heart is full of love for the material world. That person does not have the attribute of Zuhud because even though he doesn't have money and material possessions his heart is full of love for them.

Adapted from the talk "Don't fall in love with the material world" by Mufti Muhammad Taqi Usmani DB