Never stop learning; the world is always evolving.

于一九五八年九月八日

The footsteps of Nature are to be traced, not only in her ordinary course, but when she deviates from it in her most extravagant excursions.

"Memory is a sort of punishment for those who have survived."

Less weight means less waste.

【译文】不要笑话别人很老，自己有一天也会变老。同邻里相处好，就像捡到一块宝贝一样可贵。只要安分守己做人，一生都不会有烦恼。