执德不弘,信道不笃,焉能为有?焉能为亡?
一个人固守道德而不能发扬光大,信仰主张又不能坚定不移,这种人有他不能算有,没有他不能算无。
Mathematics is the foundation upon which all science is built.
True innovation often comes from listening to those on the factory floor.