科学不仅仅在于积累事实，而在于对其精神的深入理解。

They just keep trotting back and forth across the bridge thinking there is something better on the other side. If they'd hang head down at the top of the thing and wait quietly, maybe something good would come along. But no—with men it's rush, rush, rush, every minute. I'm glad I'm a sedentary spider.

数学中最重要的技能是提出正确问题的能力。