没有所谓的新想法。那是不可能的。我们只是把许多旧想法放进一个心理万花筒里,转动它们,它们就会形成新的、奇特的组合。
I'm not perfect, but I'm striving every day to be better than I was yesterday.
The deepest problems in mathematics often arise from the simplest questions.
所有的幸福都依赖于勇气和工作。