Every mathematical problem has a solution; sometimes it just takes time to find it.
The goal of mathematics is to make the simple complicated, and the complicated simple.
形容人心难以捉摸，民众的行为像烟一样飘忽不定。
Inquiry into reality begins with the recognition of our ignorance.
"We are all the sum of our choices, and sometimes, the choices of others."
——《北上宣言》，1924年11月
The story is a machine for empathy. In contrast to logic or reason, a story is about emotion which is encoded in the details.