唯一不变的是变化,持续的变化,不可避免的变化,这是当今社会的主导因素。任何明智的决策都必须考虑到世界现在的样子,以及世界未来的样子。
The chess-board is the world; the pieces are the phenomena of the universe; the rules of the game are what we call the laws of Nature.  
The great object of all regulations is to secure the utmost quantity of useful produce.