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抽象的目的不是含糊不清,而是创建一个新的语义层次,在这个层次上可以绝对精确。
Knowledge is a consequence of experience.
There is no point treating a depressed person as though she were just feeling sad, saying, 'There now, hang on, you'll get over it.' Sadness is more or less like a head cold- with patience, it passes. Depression is like cancer.