If the highest aim of a captain were to preserve his ship, he would keep it in port forever.
The pursuit of mathematical knowledge is a never-ending adventure.
不和屯积钱财的人争较财富多少;不和热心仕途的人争较地位高下;不和骄傲自夸的人争较名声大小;不和年轻力壮的人争较仪容风度,不和逞强好胜的人争较胜负高低。
没有实用性的创新只是噪音,农民需要真正的解决方案。