他说世界是为人们战斗而创造的，事物的价值在于为之战斗的价值。

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

The most important challenge facing the world today is the need to create strong, effective, and accountable states in the developing world.

The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.

El arte no debe ser un espejo que refleja, sino un martillo que forja.

"The greatest human achievements are the stories we tell each other."

领导力就是今天做出艰难的决定，以便明天让所有人受益。