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"I believe that every child deserves to see themselves in the books they read."

置身于是非之外，評斷是非才能客觀；置身于利害之外，才能看清利害的變化。

We don't inherit the earth from our ancestors; we borrow it from our children.

Freedom is a heavy load, a great and strange burden for the spirit to undertake.

數學是解開宇宙秘密和理解支配它的基本法則的關鍵。