"The most important thing is to get the right people in the right jobs."
我已将这一原则——每一微小变异若有益便被保存——称为自然选择。
Mathematics is an art, and as an artist, you have to be honest with yourself.
——在遗嘱上签名,稍休后说几句话勉励各同志,1925年3月11日