n knowledge.

挑战：
walter begehot
the great pleasure in life is doing what people say you cannot do.

机会与准备
abraham lincoln
i will prepare and some day my chance will come.

信心与事实
henry ford
whether you think you can or think you can't -- you are right.
english proverb
where there's a will there's a way.
there is no failure excepting no longer trying.
luck is what happens when preparation meets opportunity.
 

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