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What you don't do determines what you can do.
你不做的事情决定了你能做什么。
数学是模式的科学,我们研究它们以学习如何逻辑地、批判地和创造性地思考。
I went to the woods because I wished to live deliberately. I wanted to live deep and suck out all the marrow of life, to put to rout all that was not life.