Which of the following quotes is from Immanuel Kant's Groundwork of Metaphysic of Morals?
1) Act only according to that maxim whereby you can at the same time will that it should become a universal law without contradiction.
2) 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.
3) Therefore, every rational being must so act as if he were through his maxim always a legislating member in the universal kingdom of ends.