Bediüzzaman Said Nursî

"Worry is itself an illness, since worry is an accusation against Divine Wisdom, a criticism of Divine Mercy."

"He causes huge bodies like sun to proclaim His Majesty through His Names the All-Gracious, Great, reciting: ' O Glorious One, O Great One, O Mighty One', while tiny animate creatures like flies and fish proclaim His Mercy, reciting: 'O Gracious One, O Compassionate One, O Generous One"

"Do what you do only for God's sake, start for God's sake, work for God's sake, and act within the sphere of God's good approval."