Busy with Dunya?

A poet said: 
"O he who is busy with his dunya! 
Whom illusions of a long lifetime have deluded; 
Was he not in a state of heedlessness, until his appointed time drew near?
Verily death arrives suddenly, 
and the Grave is the collection-box of actions. 
Be patient over the dunya and its hardships, 
No death is there except at one’s appointed time."