插图作者提示：阅读本文可以不参考本系列关于项目组合管理的其他文章。
IllustrationAuthor's note: this article can be read without reference to my other articles in this series on portfolio management.
半个世纪过去了，这个关于爱和孤独的寓言故事，以及作者自己画的水彩插图，依然魅力不减。
More than a half century later, this fable of love and loneliness, with watercolor illustrations by the author, has lost none of its power.
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