Animals are born who they are, accept it, and that is that. They live with greater peace than people do.
The greatness of a nation and its moral progress can be judged by the way its animals are treated.
The animal is ignorant of the fact that he knows. The man is aware of the fact that he is ignorant.
In the end, we will conserve only what we love, we will love only what we understand, and we will understand only what we are taught.
The question is not, 'Can they reason?' nor, 'Can they talk?' but rather, 'Can they suffer?'
The fate of animals is of greater importance to me than the fear of appearing ridiculous; it is indissolubly connected with the fate of men.