Happiness is as a butterfly which, when pursued, is always beyond our grasp, but which if you will sit down quietly, may alight upon you.
幸福就像一只蝴蝶，当你追逐它时，总是抓不到，但如果你安静地坐下来，它可能会落在你身上。
在数学中，真理不是通过共识而是通过证明来发现的。
板块构造理论是地质学的统一理论。