No one conceals something in his heart, but Allah causes it to be seen on his face or in a slip of the tongue.
Uthman ibn AffanWorrying about the dunya is a darkness in the heart, while worrying about akhirah is a light in the heart.
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 AffanIf our hearts were truly pure, we would never have our fill of the words of your Lord
Uthman ibn Affan