Imam Ali (AS) said: The one who takes the right amount from this world for his/her livelihood, will attain tranquility and has peace of mind. On the other hand, worshipping the world is the key to difficulties and the cause of sufferings and worries as well as greed, selfishness and jealousy, the factor for losing concern to commit sins and bad deeds and it (worshipping the world) is the source of all faults [1].
[1] Nahjul Balaghah, Wisdom 371.
source : SHAFAQNA
