——在遗嘱上签名,稍休后说几句话勉励各同志,1925年3月11日
我永远不会伤害你,珍妮。
"The only limit to our realization of tomorrow is our doubts of today."
宇宙的运动是永恒的。
The most important thing in mathematics is to understand the concepts, not just to memorize formulas.