数学是人类精神最美丽和最强大的创造。
Mathematics is the most beautiful and most powerful creation of the human spirit.
One of my primary objects is to form the tools so the tools themselves shall fashion the work and give to every part its just proportion.
"Children's literature is the foundation of the imagination, the birthplace of creativity, and the first step towards a lifelong love of reading."
变化是不可避免的，但成长是可选的。
"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."
世界被创造出来是为了在一本美丽的书中终结。