America has no permanent friends or enemies, only interests.
国际关系没有永远的朋友或敌人，只有永远的利益。
It is not true that people stop pursuing dreams because they grow old, they grow old because they stop pursuing dreams.
艺术不是奢侈品，而是必需品。
I don't work with ideas, I work with materials.
Water is the source of life and the force of destruction.
"The only real failure in life is not to be true to the best one knows."
最好的领导者是那些倾听多于说话的人。
经济学家的角色既是科学家，又是工程师。