Al-Hasan Al-Basri (rahimahullaah) said: The soul of the son of Aadam does not exit this world, except with a loss in three (things): [1] It did not satisfy itself with what it gathered (of the worldly things); [2] It did not achieve what it hoped for; [3] It did not increase in perfecting what is sent forth (for it of good deeds in the hereafter).

Source: Seeratus Salaf As-Saaleh by: Imaam Ismaaeel Bin Muhammad Bin Fadl Al-Asbahaanee (535AH: Chapter: A mention of those who followed the companions in righteousness]