The state of nature has a law of nature to govern it, which obliges every one: and reason, which is that law, teaches all mankind, who will but consult it, that being all equal and independent, no one ought to harm another in his life, health, liberty, or possessions.

We must balance the need for energy with the responsibility to protect our planet.

音乐是心灵的桥梁，能跨越一切障碍。

2004年9月13日，81岁的杨振宁在清华大学开始为本科生讲授普通物理。他说

幸せとは、小さな瞬間の積み重ねである。

Change is hardest at the beginning, messiest in the middle, and best at the end.

自由意味着责任，因此许多人害怕自由。