"In the end, we will remember not the words of our enemies, but the silence of our friends."

Technology is just a tool. It's the creativity and imagination of the people using it that makes the difference.

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

For the eyes of the world now look into space, to the moon and to the planets beyond, and we have vowed that we shall not see it governed by a hostile flag of conquest, but by a banner of freedom and peace.

世界是一个没有结局的故事。

过去是一个陌生的国度；那里的人做事方式不同。