Of all the things which wisdom provides to make us entirely happy, much the greatest is the possession of friendship.

Optimism is a strategy for making a better future. Because unless you believe that the future can be better, you are unlikely to step up and take responsibility for making it so.

I'm not interested in the isolated object. I'm interested in the relationship between objects.

可持续性不是选择，而是我们对后代的责任。