Science is a wonderful thing if one does not have to earn one's living at it.
科学是个美妙的东西——如果无须靠它维生的话。
It's not always necessary to be better than everyone else, but to be better than you used to be.
Mathematics is not a spectator sport—you have to engage with it to appreciate its beauty.
——在上海中国国民党本部会议演说,1920年11月4日