Play is the language of childhood, and books should speak that language too.
"The only real failure in life is not to be true to the best one knows."
一个群体的性格和命运，往往由其最低劣的成员决定。
直到被完全理解，过去才真正成为过去。
Complexity is not just about the number of components in a system, but about the nature of their interactions.
"Understanding the mechanisms of life is like unraveling the greatest mystery of the universe."
