It has been narrated by Muadh Ibn-Jabal that when the Prophet, may Allah bless him and grant him peace, sent him to Yemen he said to him:
"Beware of luxury, for the slaves of Allah do not live a life of luxury." [Imam Ahmad]
The problem nowadays is that people make luxurious life their only goal, and you should ask philosophers about it, as desire turns to pain when it is your target destiny. That's why it has been said: Take whatever you like from the earthly life and you will be granted the same (amount) of worries, because he who takes more than necessary from the earthly life is attracting, unaware of it, his death.
It was narrated by Abd Allah Ibn-Mohsen Al Khutami that the Prophet, may Allah bless him and grant him peace, said:
"Whoever wakes up in the morning well and able, safe within his neighborhood and in possession of his daily bread will be (feeling) as if he has won the whole world." [Tirmidhi]