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One of the most popular superstitions is [knocking|stomping] on wood. The roots go back to the ancient times when people believed that [good spirits|fairies] lived in trees, so by knocking they asked them to [help|give]. A lot of people today believe that it's enough to say "knock on wood" to have good luck and succeed. But the truth is you need more than [good luck|wood] to be successful. People work hard to have a good career and success. And all of us have both good and bad times. So, maybe luck doesn't play a [role|mistake] in our lives?