Quote by Immanuel Kant
"A kingdom of ends is possible only if we treat all rational beings as ends in themselves."
More from Immanuel Kant
"Act only according to that maxim whereby you can at the same time will that it should become a universal law."
"Sapere aude! Dare to know! Have courage to use your own understanding."
"Two things awe me most: the starry sky above and the moral law within."
"Happiness is not an ideal of reason but of imagination."