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It is always good to have a problem that you cannot solve. It means you have something to work on.
The most basic question is not what is best, but who shall decide what is best.
Life is about taking chances and trying new things.
在荒野中,你学会失败不是终点。它只是旅程中的一步。
In mathematics, the art of proposing a question must be held of higher value than solving it.