The more you know, the more you realize you don't know.

Reflect upon your present blessings, of which every man has plenty; not on your past misfortunes, of which all men have some.

只要人类继续无情地摧毁较低级的生命，他们永远不会知道健康和和平。因为只要人类屠杀动物，他们也会相互杀戮。

唯一的好是知识，唯一的恶是无知。