The pace of change demands that we unlearn as much as we learn.
变化的速度要求我们忘记的和学习的一样多。
"What good is the warmth of summer, without the cold of winter to give it sweetness."
I have never known any distress that an hour's reading did not relieve.
自由确实珍贵;如此珍贵以至于必须谨慎配给。
物理学家必须拥有生动的直觉想象力,因为新思想不是通过演绎产生的,而是通过艺术性的创造性想象。