It is reported that Yūnus b. ‘Ubayd (d. 139H) – Allāh have mercy on him – said:
I only liken the worldly life (dunyā) to a man who, whilst sleeping, sees in his dream things he likes and things he does not like. Then he wakes up (the world ends and the next life starts).
Ibn Abī Al-Dunyā, Dham Al-Dunyā article 21.
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It is reported that Al-Hasan Al-Basrī – Allāh have mercy on him – said: How strange it is that a people whose departure (from this world to the next) has been announced, and whose predecessors have already departed, still play around! Abū Bakr Al-Daynūrī, Al-Mujālasah wa Jawāhir Al-‘Ilm article 843.
The difference between you and the one in the grave.
It is reported that Al-Hasan Al-Basrī – Allāh have mercy on him – said: Four signs of wretchedness are: [having] a hard heart, dry eyes [that never cry], extended hopes [about this life], and greed and keenness to amass worldly things (the dunyā). Ibn Abī Al-Dunyā, Kitāb Al-Zuhd article 36.