You are referring to the 1983 US Festival interview with MTV's Mark Goodman. Both are high as a kite during the interview. Mark wrote in the book the amounts of coke he did with rock stars and he and Stevie were really good friends.
The question he asks is "is there a song from The Wild Heart that is close to you? Stand Back?" Then Stevie says The Nightbird because she lost someone close to herself lately. You are correct she also says The Wild Heart is really wild and not as fragile as Bella Donna. Try searching for Stevie interview during the 1983 US Festival.
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 My heart will rise up with the morning sun and the hurt I feel will simply melt away
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