The progress of mathematics is measured by the number of problems it can solve.
梦想是上帝的语言。当他用我们的语言说话时,我可以解读他的意思。但如果他用灵魂的语言说话,只有你自己才能理解。
The study of memory is the study of human nature.
A man may die, nations may rise and fall, but an idea lives on. Ideas have endurance without death.