The illusory and transitory nature of the life of this world stems from the fact that it is not permanent, that it will one day come to an end. As the Qur'an states, "He Who created death and life to test which of you is best in action" (Surat al-Mulk, 2), Allah has created the Earth and the blessings of the world in order to test man, to separate those who are committed to behaving in a godly manner from those who embrace evil rather than good. Each of us will remain here for only a short time and can only enjoy these blessings for a limited period, according to Allah's will. It is the Hereafter in which people will live their true lives. This is how Allah has revealed in the Qur'an that the Hereafter represents one's true life:
The life of this world is nothing but a game and a diversion. The abode of the Hereafter-that is truly Life if they only knew. (Surat al-'Ankabut, 64)