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最伟大的旅程是那些在不知不觉中改变我们的旅程。
Always keep your knife sharp, your wits sharper, and your spirit sharpest.
Thought's infidelity lies in its privacy. 'If there is something that you cannot say to me,' asks the lover, 'things that you must think alone, then can you really be trusted?'
学习数学的唯一方法就是做数学。
Quality is not a guarantee; it is a commitment.