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I have great faith in optimism as a guiding principle, if only because it offers us the opportunity of creating a self-fulfilling prophecy.

"Sir Arthur C. Clarke: 90th Birthday Reflections". Arthur C. Clarke's message delivered on his 90th birthday, www.youtube.com. 2007.
I have great faith in optimism as a guiding principle, if only because it offers us the opportunity of creating a self-fulfilling prophecy.