Key quality was optimism.in reference to:
"On the centennial of FDR's birth, George Will wrote: Anyone who contemplates this century without shivering probably does not understand what is going on. But Franklin Roosevelt was, an aide said, like the fairy-tale prince who did not know how to shiver. Something was missing in FDR. ...But what FDR lacked made him great. He lacked the capacity even to imagine that things might end up badly."
- The FDR Years: On Roosevelt and His Legacy (view on Google Sidewiki)