I guess I intend this thread to be an offshoot of "Effective Vegan Messaging." Post quotes of famous people making comparisons between animals and humans here. I don't mean it to be controversial. (If mods feel that it's too controversial, feel free to take it down). I just find these comparisons to be illuminating, whether I always agree with them or not.
Here's one I really enjoy. It's from George Orwell, explaining the origin of his book "Animal Farm." Emphasis mine.
...I saw a little boy, perhaps ten years old, driving a huge carthorse along a narrow path, whipping it whenever it tried to turn. It struck me that if only such animals became aware of their strength we should have no power over them, and that men exploit animals in much the same way as the rich exploit the proletariat.