当人们快乐时，他们不会注意到是冬天还是夏天。
People don’t notice whether it’s winter or summer when they’re happy.
Only by continuous learning can we make continuous progress.
"Human nature is not infinitely malleable; it comes with an inherent structure that channels development in certain directions."
"The world is full of obvious things which nobody by any chance ever observes."
阅读好书，就如同与过去几个世纪最杰出的人物交谈。
"Hope is a fragile thing, but it is also the most powerful force we have."