The real tragedy of the poor is that they can afford nothing but self-denial.

Sometimes it’s the journey that teaches you a lot about your destination.

追求知识是一段永无止境的旅程，每一个发现都为新的问题打开了大门。

我会设身处地地为站在我面前的人着想。

Every forest began with a single seed, just like every great enterprise.

儿童擅长在自由活动中建立规律。

True innovation comes from a deep understanding of existing problems.