Possible Clues:

• "I must create a system, __ enslav'd by another Man's": Blake
• Kill --- killed
• Eat __ eaten (law of the jungle)
• ''Eat __ eaten''
• '... there ___ square'
• "Eat — eaten" (law of survival)
• 'Kill ___ killed' (desperate mantra)
• 'Eat ___ eaten'
• "Awake, arise __ forever fallen!": Milton
• '... there -- square'