Mathematics is not a spectator sport. You have to get involved.
数学不是一项观赏性运动。你必须参与其中。
Every piece of furniture should be a reflection of craftsmanship and passion.
A writer is a person who is not satisfied with the world as it is, who wants to change it, to improve it, to make it more beautiful, more just, more livable.
Quality in materials reflects quality in character.
摆脱诱惑的唯一方法就是屈服于它。