Kant, Immanuel

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

"All our knowledge begins with the senses."

"The only thing that has intrinsic worth is a good will."

"Thoughts without content are empty; intuitions without concepts are blind."

"Brevity is the soul of wit."

"We are not rich by what we possess but by what we can do without."

"If justice perishes, human life has lost its value."

"The greatest religion is to be true to this life, to make the most of it."

"Man is the only being who stands in need of education."

"I ought never to act except in such a way that I can at the same time will that my maxim should become universal law."

"There is nothing either good or bad, but thinking makes it so."

"Time is a necessary representation that underlies all intuitions."

"The starry heavens above and the moral law within are the two greatest wonders."

"Through education we become truly human."

"A human being is to be treated as an end in itself, never merely as a means."

"All our knowledge is, so to speak, at a height from the ground."

"Nothing can possibly be conceived which could be called good without qualification except a good will."

"The greatest freedom is not doing what one likes, but not having to do what one dislikes."

"Religion is a system of duties, not of beliefs."

"Enlightenment is man's emergence from his self-imposed nonage."

"The use of freedom is its own purpose."

"Nature has made our sense organs blind to our flaws."

"Have courage to use your own reason—that is the motto of enlightenment."

"The success of a government rests on the consent of the governed."

"Beauty is not a matter of taste; it is a matter of judgment."

"Act as if your every action creates universal law."

"Experience without theory is blind, but theory without experience is merely intellectual play."

"Genius is a talent for producing something for which no determinate rule can be given."

"Patience is the complement of courage."

"The human is that creature who must be educated."