Treat people as an end, and never as a means to an end

Act in such a way that you treat humanity, whether in your own person or in the person of another, always at the same time as an end and never simply as a means.

Act so as to treat humanity, whether in your own person or in that of another, at all times also as an end, and not only as a means.

Act in such a way that you treat humanity, whether in your own person or in the person of any other, never merely as a means to an end, but always at the same time as an end.

Every being is an end. In other words, every being is to be taken into account in determining the ends of conduct. This is the only consistent outcome of the ethical process which is in course of evolution on the earth. This world was not made and presented to any particular clique for its exclusive use or enjoyment. The earth belongs, if it belongs to anybody, to the beings who inhabit it—to all of them. And when one being or set of beings sets itself up as the sole end for which the universe exists, and looks upon and acts toward others as mere means to this end, it is usurpation, nothing else and never can be anything else, it matters not by whom or upon whom the usurpation is practised.

Treating a being as an end in itself means respecting the value of what makes it such an end. After we see that this value resides in rational nature, we see it implies that, at least in general, rational beings should not be subjected to deception or coercion. Instead, we should seek to harmonize our strivings with those of other rational beings toward their ends.

All beings are ends; no creatures are means. All beings have not equal rights, neither have all men; but all have rights. The Life Process is the End—not man, nor any other animal temporarily privileged to weave a world's philosophy. Non-human beings were not made for human beings any more than human beings were made for non-human beings. Just as the sidereal spheres were once supposed by the childish mind of man to be unsubstantial satellites of the earth, but are known by man's riper understanding to be worlds with missions and materialities of their own, and of such magnitude and number as to render terrestrial insignificance frightful, so the billions that dwell in the seas, fields, and atmospheres of the earth were in like manner imagined by the illiterate children of the race to be the mere trinkets of men, but are now known by all who can interpret the new revelation to be beings with substantially the same origin, the same natures, structures, and occupations, and the same general rights to life and happiness, as we ourselves.

No matter what they wish for, no matter how far they go, people can never be anything but themselves. That's all.

...[M]an and generally any rational being exists as an end in himself, not merely as a means to be arbitrarily used by this or that will, but in all his actions, whether they concern himself or other rational beings, must always be regarded at the same time as an end... [R]ational beings... are called persons, because their very nature points them out as ends in themselves, that is, as something which must not be used merely as means, and so far therefore restricts freedom of action (and is an object of respect).

Power is not a means; it is an end.

Man, and in general every rational being, exists as an end in himself, not merely as a means for arbitrary use by this or that will: he must in all his actions, whether they are directed to himself or to other rational beings, always be viewed at the same time as an end.

The dignity of the human person demands that all men and women be treated, not as animals, nor as machines, but as persons and children of God.

Let me simply state that it is wrong to regard any other human being, a priori, as an object, or an 'It.' This is so because each and every human being - you, every friend, every stranger, every foreigner - is precious.

Never treat any person as a means. Treat everybody as an end in himself, in herself — then you don’t cling, then you are not attached. You love, but your love gives freedom — and, when you give freedom to the other, you are free. Only in freedom does your soul grow. You will feel very, very happy.