外交家应该具备灵活性和适应性，以应对快速变化的国际环境。

译文：不能让智巧劳烦打扰我们的心境，不能让私利拖累我们的自身；把国家的治乱寄托在法术上，把是非的判断寄托在赏罚上。

The best thing about success is being able to share it.

The world is full of willing people; some willing to work, the rest willing to let them.

In science, the credit goes to the man who convinces the world, not to the man to whom the idea first occurs.