释义：因为一个关键的错误，可能导致整体的失败，一切努力都白费。
Books make great gifts because they have whole worlds inside of them.
The only real failure in life is not to be true to the best one knows.
If it doesn't challenge you, it won't change you.
数学家的工作永远不会真正完成；总有更多的东西需要探索。
"The most important thing is to stay focused on the mission."
心灵是一个连续的事件流。