‘Exactly. Only then will you be acting in accordance with the moral law within you. Kant also formulates the “categorical imperative” in this way: Act in such a way that you always treat humanity, whether in your own person or in the person of any other, never simply as a means, but always at the same time as an end.’ ‘So we must not exploit other people to our own advantage.’ ‘No, because every man is an end in himself. But that does not only apply to others, it also applies to you yourself. You must not exploit yourself as a mere means to achieving something, either.’

