" The Greeks differentiated between types of desire. They had a concept called eros, a longing for something, which is never really fulfilled—wanting more and more. The Prophet said, “Nothing will fill the mouth of the son of Adam except the soil of his own grave. If he had one mountain of gold, he will only desire a second.” The Prophet also said, “Two people will never be satiated: seekers of knowledge and seekers of the world.” Covetousness, if it is not for God and His religion, will be for worldly things. "

― Hamza Yusuf , Purification of the Heart: Signs, Symptoms and Cures of the Spiritual Diseases of the Heart