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The best programs are written so that computing machines can perform them quickly and so that human beings can understand them clearly. A programmer is ideally an essayist who works with traditional aesthetic and literary forms as well as mathematical concepts, to communicate the way that an algorithm works and to convince a reader that the results will be correct.

Today is cruel, tomorrow is crueler, and the day after tomorrow is beautiful, but most people will die tomorrow night, so don't give up today.

The purpose of psychotherapy is to set people free.

數學是上帝用來書寫宇宙的語言。