We must be free not because we claim freedom, but because we practice it.

The most successful societies in the world are those that have been able to combine the strengths of the market with the strengths of a strong state.

穷人并非不理性；他们和任何人一样理性，但他们在非常不同的约束下行动。

量子场论的发展表明，真空并非空无一物，而是潜能的海洋。