这是我个人的一小步，却是全人类的一大步。
预测未来的最好方法就是创造未来。
You must be the change you wish to see in the world.
To be human is to be in the world, and to be in the world is to be in time.
When I approach a child, he inspires in me two sentiments; tenderness for what he is, and respect for what he may become.