在我决定开展慈善工作时，我曾花费大量时间来研究历史上各大基金会的运作方式，然后考虑如果由我来做慈善工作，该如何这些工作更有效率。首先引起我关注的是全球人口增长问题，其次是全球生态环境问题。
——2000年10月18日出席西雅图一次会议时的发言
惩罚应适应犯罪者，而非罪行本身。
The past must be respected, but not copied.
I think it's important to have a good hard failure when you're young... I learned a lot from that. Because it makes you kind of aware of what can happen to you. Because of it, I've never had any fear in my whole life when we've been near collapse and so on. I've never been afraid.
The method of psychology must be as precise as possible.
我们必须建立一个没有经济支配的世界。