代数是人类创造的一种智力工具，用于清晰地表达世界的数量关系。
失败并不总是错误，它可能只是一个人在特定情况下能做到的最好结果。真正的错误是停止尝试。
The great thing is to be in love with life.
Reflection on the past is the source of wisdom for the future.
I want to do what I like all day. I want to sit in a roadside cafe and look in the shop window. Walk in the rain and do something fun or even exciting.
