“Wherever an altar is found, there civilization exists.”

From Nothing Personal, a collaboration with the photographer Richard Avedon (1964). Baldwin's text for the volume can be found " here https://scholarworks.umass.edu/cgi/viewcontent.cgi?article=1042&context=cibs".
Context: One must say Yes to life, and embrace it wherever it is found - and it is found in terrible places. … For nothing is fixed, forever and forever, it is not fixed; the earth is always shifting, the light is always changing, the sea does not cease to grind down rock. Generations do not cease to be born, and we are responsible to them because we are the only witnesses they have. The sea rises, the light fails, lovers cling to each other and children cling to us. The moment we cease to hold each other, the moment we break faith with one another, the sea engulfs us and the light goes out.

The Divine Commodity: Discovering A Faith Beyond Consumer Christianity (2009, Zondervan)

Address The Call to Service (1917); " A world in ferment; interpretations of the war for a new world https://archive.org/stream/worldinfermentinw00butl/worldinfermentinw00butl_djvu.txt"

"How Do You Say ‘Billionaire’ in Esperanto?" in The New York Times (December 16, 2010) http://cityroom.blogs.nytimes.com/2010/12/16/how-do-you-say-billionaire-in-esperanto/

Source: The Natural and Artificial Right of Property Contrasted (1832), p. 12

Source: Watchmen

Speech in House of Commons, as recorded (in third person) in the | minutes of 20 June, 1839 http://hansard.millbanksystems.com/commons/1839/jun/20/education-adjourned-debate#S3V0048P0_18390620_HOC_4.
1830s
Context: [It appears to me that] the Society of Education, that school of philosophers, were, with all their vaunted intellect and learning, fast returning to the system of a barbarous age, the system of a paternal government. Wherever was found what was called a paternal government was found a state education. It had been discovered that the best way to insure implicit obedience was to commence tyranny in the nursery. There was a country in which education formed the only qualification for office. That was, therefore, a country which might be considered as a normal school and pattern society for the intended scheme of education. That country was China. These paternal governments were rather to be found in the east than in the west, and if the hon. Member for Waterford asked [me] for the most perfect programme of public education, if he asked [me] to point out a system at once the most profound and the most comprehensive, [I] must give him the system of education which obtained in Persia. Leaving China and Persia and coming to Europe, [I] found a perfect system of national education in Austria, the China of Europe, and under the paternal government of Prussia. The truth was, that wherever everything was left to the government the subject became a machine.

As quoted in Sid Meier's Civilization V (2010).