"A rational, moral being cannot, without infinite wrong, be converted into a mere instrument of others’ gratification. He is necessarily an end, not a means. A mind, in which are sown the seeds of wisdom, disinterestedness, firmness of purpose, and piety, is worth more than all the outward material interests of a world. It exists for itself, for its own perfection, and must not be enslaved to its own or others’ animal wants."