The farmer is the only man in our economy who buys everything at retail, sells everything at wholesale, and pays the freight both ways.

To enjoy freedom we have to control ourselves.

Great design is about creating something that is both beautiful and functional.

模型的好坏取决于其假设。

The main task in life is simply this: to identify and separate from the things that are not ourselves, so that we can become ourselves.

译文：弱者容易得到同情，强者反而招人怨恨。

不要去跟随已经有的道路，去探索没有被开拓的新道路，留下自己的足迹。