Worrying about the dunya is a darkness in the heart, while worrying about akhirah is a light in the heart.
Uthman ibn AffanAllah the Exalted loves him who forgoes worldly life, the Angels love him who rejects the vices, and the Muslims love him who gives up greediness in respect of the Muslims.
Uthman ibn AffanIf our hearts were truly pure, we would never have our fill of the words of your Lord
Uthman ibn AffanAbsorption in worldly affairs breeds darkness in the heart, and absorption in the affairs of the next world enkindles light in the heart
Uthman ibn Affan