"The past is a foreign country; they do things differently there."

The whole art of teaching is only the art of awakening the natural curiosity of young minds for the purpose of satisfying it afterwards.

市场组合是所有投资者都应持有的唯一风险组合。

思想的存在是为了服务行动，而不仅仅是反映现实。

权力的平衡是和平的天平。