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I am not interested in solving problems that are already solved.
The improvement of understanding is for two ends: first, our own increase of knowledge; secondly, to enable us to deliver that knowledge to others.
In such condition there is no place for industry...and which is worst of all, continual fear and danger of violent death.
你和你的目标之间唯一的障碍是你不断告诉自己为什么不能实现它的故事。