Act so that you use humanity, as much in your own person as in the person of every other, always at the same time as end and never merely as means.

Finally, there is one imperative that, without being grounded on any other aim to be achieved through a certain course of conduct as its condition, commands this conduct immediately. This imperative is categorical . . . . This imperative may be called that of morality .

There is nothing it is possible to think of anywhere in the world, or indeed anything at all outside it, that can be held to be good without limitation, excepting only a good will .

Act only on that maxim whereby you can at the same time will that it should become a universal law.

Dare to know! Have the courage to use your own reason!

Every man is to be respected as an absolute end in himself, and it is a crime against the dignity that belongs to him as a human being, to use him as a mere means for some external purpose.

All our knowledge begins with the senses, proceeds then to the understanding, and ends with reason. There is nothing higher than reason.

Morality is not properly the doctrine of how we may make ourselves happy, but how we may make ourselves worthy of happiness.

From such crooked wood as that which man is made of, nothing straight can be fashioned.

May you live your life as if the maxim of your actions were to become universal law.