Surah Yunus, Ayat 45

Ayat 45. And on the Day when He shall gather (resurrect) them together, (it will be) as if they had not stayed (in the life of this world and graves, etc.) but an hour of a day. They will recognize each other. Ruined indeed will be those who denied the meeting with Allah, and were not guided.

Hazrat Abdullah bin Umar (May Allah be pleased with them) reported: Messenger of Allah  [SAWW](PBUH) took hold of my shoulders and said, "Be in the world like a stranger or a wayfarer".

Ibn `Umar (May Allah be pleased with them) used to say: "When you survive till the evening, do not expect to live until the morning; and when you survive until the morning, do not expect to live until the evening; (do good deeds) when you are in good health before you fall sick, and (do good deeds) as long as you are alive before death strikes". [Al-Bukhari Volume 8, Book 76, Hadith Number 425].  

Lesson : as mentioned above in Surah Yunus Ayat 45. "Ruined indeed will be those who denied the meeting with Allah"  A person who will consider this world as a temporary stage, will certainly not like that his clothes be entangled in thorny bushes of this world. The greatest fault of man is that he does not understand this status of the world. In spite of the fact that he is not sure of a moment's life here, he occupies himself in amassing goods and riches which would last for a hundred years.