忙碌是一种懒惰——懒惰的思考和轻率的行动。
Being busy is a form of laziness—lazy thinking and indiscriminate action.
The only learning which significantly influences behavior is self-discovered, self-appropriated learning.
The unity of mathematics is not an illusion but a reality waiting to be uncovered.
地壳在某种程度上是过去时间的博物馆。
做出伟大工作的唯一方法就是热爱你所做的事情。