A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects.

                                                                   ---Robert A. Heinlein

一个人应该有能力更换尿布、策划侵略、杀猪、操舵行船、设计建筑、写十四行诗、平衡收支、造墙、接骨、宽慰临终之人、接受指令、发布命令、团队协作、单兵作战、求解方程、分析新问题、铲除粪便、编写程序、做可口的饭菜、有效地战斗、英勇地死去。只有虫豸才讲特长
                                   ---Time Enough for Love，罗伯特·安森·海因莱因