——1963年6月25日在西德市政厅柏林墙前的演说

自由不是礼物，而是必须每天争取的成就。

"Sometimes we get sad about things and we don’t like to tell other people that we are sad about them."

Data-driven policies are essential to ensure the long-term viability of marine resources.

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

我坚信，自我教育是唯一存在的教育类型。