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The only time you should ever look back is to see how far you've come.

數學是理性的音樂。

可持續的世界始于可持續的選擇。

Change will not come if we wait for some other person or some other time. We are the ones we've been waiting for. We are the change that we seek.

我對人類的狀況以及人們在極端壓力下的反應感興趣。