Mathematics is a creative endeavor, just like art or music.
The best economic insights come from observing how people actually behave.
I accept chaos, I'm not sure whether it accepts me.
至今一切社会的历史都是阶级斗争的历史,即剥削阶级和被剥削阶级之间、统治阶级和被压迫阶级之间斗争的历史。