To lose a language is to lose a way of seeing the world.

定理是永恒的；它们的证明是短暂的。

The key to successful investing is to have a clear understanding of the market and the risks involved.

Nature never deceives us； it is always we who deceive ourselves.

世界上充满了神奇的事物，耐心地等待着我们的感官变得更加敏锐。

先读经书，再读史籍，以经论史，评论古人史事，就不会与圣贤相悖；研读史籍，再温经书，以史证经，读书目的升华，决不仅为章句之学。