Ibn Shaddad al-Fahri (r.a.) reported that the Prophet (s.a.w.s.) said:
"This world, in comparison with the world to come, is the same as if one of you were to put his finger in the ocean. Consider how much you would have when you pulled it out."
Abu Hazim az Zahid (r.al) was asked:
"What is your wealth?"
"Two kinds of wealth dispel all fear of poverty; trust in Allah and not being attached to what people have."
He was asked:
"Don't you fear poverty?"
"How can I fear poverty when my lord owns all that is in the heavens and on the earth and all that is between them and all that is beneath the ground?"
Al-Fudayl (r.al) said:
"The essence of living simply is being content with Allah (Mighty and Exalted is he)."
He also said:
"The one who is content is the one who lives simply, and it is he who is rich."
As Omar (r.a.) said:
"Death is teacher enough, true faith is wealth enough, and worship is action enough."