Possible Clues:

• Finch "What It ___ Burn"
• "That ___ say . . ."
• Amy Winehouse "To Know Him ___ Love Him"
• Math ratio words
• Beatles "To Know Her ___ Love Her"
• Finch hit "What It ___ Burn"
• 'To know me __ love me'
• "Who __ blame?"
• Which ___ say
• Analogist's colon