一个词的意义不是心智实体，而是社会实践。
The meaning of a word is not a mental entity， but a social practice.
对称性是降低复杂性的概念（协同例程包括子例程）；到处寻找它。
"In the end, we will remember not the words of our enemies, but the silence of our friends."
Success is the only option, failure is not.