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Just as valuable energy is wasted by spending time on activities that are of no value, energy can
be wasted on loose thinking. Imagine that your mind has an energy measure of 1000 watts at its
disposal. Each time your mind wanders off the project at hand, to a nagging worry, to all the things to
do by the end of the day, 100 watts is lost. Quite soon the entire energy supply is gone. This is the
nature of the mind. Fail to discipline it and your energy levels will be depleted and your
accomplishments will be minimal. Control it and you will see great things happening. You will feel
more powerful and achieve difficult tasks with ease. The 19th century philosopher Henri Frederic
Amiel summed it up nicely: "for purposes of action, nothing is more useful than narrowness of thought
combined with energy of will."
正如通过花时间对无价值的活动浪费宝贵的精力，能量浪费在宽松的思维上。 想像一下，你的心灵能量可以达到1000瓦。 每当你的头脑流下手头的项目，一个噩梦的担心，一切都要做的事情，一天结束，100瓦失去了。 很快，整个能源供应消失了。 这是心灵的本质。 没有纪律，你的能量将被耗尽，你的成就将会很小。 控制它，你会看到伟大的事情发生。 你会感觉更强大，轻松实现困难的任务。 19世纪的哲学家亨利·弗雷德里克·阿米尔（Henri Frederic Amiel）很好地总结道：“为了行动的目的，没有什么比思想的狭隘与思想的能量结合更有用。