We mustn’t give trouble a shape before it throws its shadow. ― Irene Hunt, Across Five Aprils. (Berkley; Reprint edition January 8, 2002) Originally published 1964.
It appeared that the swift wings of their desires would have shattered against the iron gates of the impossible. — Stephen Crane, The Red Badge of Courage ( Prestwick House Inc. , 2004; first published 1895)