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

Sustainability in mining isn't an option—it's a responsibility we owe to future generations.

We must resist the temptation to make African art merely illustrative of theory.

父母们想知道为什么溪流是苦的，而他们自己却毒害了泉水。

最重要的是保持好奇心，不断学习，不断成长。

对于劳动者来说，最大的幸福是有充足的物质享受。

每当我们教孩子一些东西时，我们就阻止了他自己去发明它。