光就是一切。它定义形式，创造空间，并赋予画作生命。
"Light is everything. It defines form, creates space, and gives life to the painting."
发现的喜悦是推动数学家前进的动力。
To convince someone of the truth, it is not enough to state it, but rather it must be found.
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。