Man is a rational animal—so at least I have been told. … Aristotle, so far as I know, was the first man… — Bertrand Russell Copy Share Image
I fear animals regard man as a creature of their own kind which has in a highly dangerous fashion lost its healthy… — Friedrich Nietzsche Copy Share Image
It doesn't matter if an animal can reason. It matters only that it is capable of suffering and that is why I… — Albert Schweitzer Copy Share Image
