The greatest problem for mathematicians now is probably the Riemann Hypothesis.
Agricultural research should address national needs and solve practical problems, it cannot be separated from production practice.
永远不要让自尊心妨碍你在需要时寻求帮助。
The poor dream all their lives of getting enough to eat and looking like the rich. And what do the rich dream of? Losing weight and looking like the poor.
"Escrever é um ato de coragem, de enfrentar os próprios demônios."
How often do we tell our own life story? How often do we adjust, embellish, make sly cuts? And the longer life goes on, the fewer are those around to challenge our account, to remind us that our life is not our life, merely the story we have told about our life.