聪明的人戒太明察，刚强的人戒太暴躁，温和的人戒优柔寡断。

每个生命都包含自己的奥秘，传记作者必须尊重那些不可知的部分。

可持续发展不是一种选择；它是我们对后代的责任。

I think it's important to have a sense of humor about yourself.

Energy poverty is one of the greatest challenges of our time. Access to affordable energy should be a right, not a privilege.