By taking risks, Human being have move them hands the needle of the times. They have accumulated wisdom from many challenges and passed it on to descendants to spin the "now."

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Put your hand on your chest and ask. What are you taking now?
Is it a risk to challenge or no risk to challenge?

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There are not always happy end in the future. 
Still, I call the person who move the hands of time by themself  Risktaker.