了解心灵的方法是对其进行逆向工程：弄清楚自然选择设计它来完成什么任务。
The soul of a poet is like a mirror that reflects the beauty of the world.
To every action there is always opposed an equal reaction； or， the mutual actions of two bodies upon each other are always equal， and directed to contrary parts.
Technology in forestry should serve sustainability, not just efficiency.
