Animals are not self-conscious and are there merely to an end. That end is man. If he is not to stifle his human feelings, he must practice kindness toward animals, for he who is cruel to animals becomes hard also in his dealing with men. We can judge the heart of a man by his treatment of animals

This quote is by Immanuel Kant and is meant to defend animals from the cruel actions of men.

Explanation:

German Immanuel Kant was one of the most influential philosophers of all time. Kant opposed Utilitarianism, an ethical theory that reduced the rights or wrongs of an action to how positive or negative the outcome of said action was, which could lead to vile actions since nothing was really wrong unless it had bad consequences.

To Kant, animals were deserving of good treatment, and he believed that a man who is cruel to animals is also cruel to other men.

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