改变是好的。改变就是进步。没有改变，一切都不会改善。
The best way to learn mathematics is to do mathematics.
The divine right of husbands, like the divine right of kings, may, it is hoped, in this enlightened age, be contested without danger.
The great challenge of the modern world is to create institutions that are strong enough to govern effectively but also accountable and responsive to the needs of citizens.
——1912年在旧金山丽蝉戏院的演说
The success of liberal democracy depends on the ability of its institutions to adapt to changing circumstances.