You are never too old to set another goal or to dream a new dream.
你永远不会太老去设定另一个目标或梦想一个新的梦想。
Pleasure is the greatest good, and we should seek it and avoid pain.
永远保持好奇心，突破往往就在那里发生。
Innovation in physics often comes from looking at old problems in new ways.
思想的自由是最珍贵的自由。