The assumption that animals are without rights and the illusion that our treatment of them has no moral significance is a positively outrageous example of Western crudity and barbarity. Universal compassion is the only guarantee of morality.

Compassion for animals is intimately associated with goodness of character, and it may be confidently asserted that he who is cruel to animals cannot be a good man.

Mitleid mit den Thieren hängt mit der Güte des Charakters so genau zusammen, daß man zuversichtlich behaupten darf, wer gegen Thiere grausam ist, könne kein guter Mensch seyn.

Compassion is the basis of morality.

Humanity's true moral test, its fundamental test…consists of its attitude towards those who are at its mercy: animals.

The assumption that animals are without rights and the illusion that our treatment of them has no moral significance is a positively outrageous example of Western crudity and barbarity. Universal compassion is the only guarantee of morality." - Arthur Schopenhauer, German philosopher