Possible Clues:

• Cause of quailing
• Courage opposite
• see 21
• What daredevils seem to lack
• Freedom from ___ (last of FDR's Four Freedoms)
• Possible cause of shaking
• Neil Diamond "___ of the Marketplace"
• 'That little darkroom where negatives are developed,' per Michael Pritchard
• '___ leads to anger, anger leads to hate, hate leads to suffering': Yoda
• Certain motivator