The more we learn of the true nature of non-human animals, especially those with complex brains and corresponding complex social behaviour, the more ethical concerns are raised regarding their use in the service of man—whether this be in entertainment, as ‘pets,’ for food, in research laboratories or any of the other uses to which we subject them.

人总是在接近幸福时倍感幸福，在幸福进行时却患得患失。

未经省察的人生不值得过。

只有当人认识到自己对别人的依赖时，他才是真正自由的。