Kant, Immanuel

"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 the courage to use your own understanding."

"Two things awe me most: the starry sky above and the moral law within."

"I am never content with myself in relation to my knowledge and virtue."

"A kingdom is an empire of laws and not of men."

"The basis of morality is freedom."

"Man can become man only by education."

"Science is organized knowledge."

"We cannot hold a torch to light another's path without brightening our own."

"All our knowledge begins with the senses."

"Immorality is not properly subject to criminal punishment."

"God, freedom, and immortality are the three central concepts that define human existence."

"Humans can be perfected only by education."

"The starry heavens above and the moral law within—these fill my mind with awe."

"There is no royal road to science."

"Do not treat people merely as a means to your own ends."

"Freedom is not given to us by nature; we must conquer it ourselves."

"I have to deny knowledge in order to make room for faith."

"Anger is an affect which is on the whole opposed to virtue."

"The greatest achievement of human reason is to have ascertained that life is a duty."

"One cannot deny that all our knowledge begins with experience."

"Perpetual peace is only possible under a federative union of free states."

"Three things give me hope: religion, philosophy, and the moral law."

"A categorical imperative would be a proposition which represented an action as necessary."

"The moral law is holy; man is holy; but man is not perfectly holy."

"I am not concerned with the happiness of the world, but with my duty."

"Suicide is not a means to an end; it is an end in itself."

"A human being should never be treated as a mere means."

"The good will is good not because of what it accomplishes but because it is good in itself."

"Enlightenment is humanity's release from its self-incurred tutelage."