Mathematics is the poetry of logical ideas.
〈党员须宣传革命主义〉,在梧州对国民党员的演说,1921年10月29日至11月15日间
城市是人类最伟大的发明。
整个有机体最复杂的反射就是所谓的本能。
And I urge you to please notice when you are happy, and exclaim or murmur or think at some point, 'If this isn't nice, I don't know what is.'