真正的斗争不是在善与恶之间，而是在痛苦与快乐之间。
The real struggle is not between good and evil but between pain and pleasure.
"The world is a library of stories, and every person is a book."
My work is about the body, even when it's not visible.
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
数学不是关于数字、方程、计算或算法的：它是关于理解的。
I don't fear failure. I fear not trying.