"The greatest problem for the human species, the solution of which nature compels it to seek, is the achievement of a universal civic society which administers law."

"The highest principle of morality is therefore: Act according to a maxim which can at the same time be valid as a universal law."

"The concept of freedom is the keystone of the whole edifice of a system of pure reason."

"Treat humanity, whether in your own person or in the person of any other, always at the same time as an end, never merely as a means."

"The fact that the beautiful is the symbol of the morally good, and that it is only in this respect that it gives us pleasure with a claim to the agreement of everyone, is a point of which everyone wou…"