al-Hasan al-Basri

The world is 3 days: As for yesterday, it has vanished along with all that was in it. As for tomorrow, you may never see it. As for today, it is yours, so work on it.

For this world has neither worth nor weight with God; so slight it is, it weighs not with God so much as a pebble or a single clod of earth; as I am told, God has created nothing more hateful to Him than this world, and from the day He created it He has not looked upon it, so much He hates it.