“With moral degradation goes political degradation.”

"Art Under Plutocracy" (1883).
Context: So long as the system of competition in the production and exchange of the means of life goes on, the degradation of the arts will go on; and if that system is to last for ever, then art is doomed, and will surely die; that is to say, civilization will die.

Message regarding unacceptable behaviour (2013)
Context: Every one of us is responsible for the culture and reputation of our army and the environment in which we work. If you become aware of any individual degrading another, then show moral courage and take a stand against it. No one has ever explained to me how the exploitation or degradation of others, enhances capability, or honours the traditions of the Australian Army.

Upon being forced to leave a train car due to his color, as quoted in Up from Slavery (1901), Ch. VI: "Black Race And Red Race, the penalty of telling the truth, of telling the simple truth, in answer to a series of strange questions", by Booker T. Washington

Source: Where Angels Fear to Tread (1905), Ch. 10
Context: This woman was a goddess to the end. For her no love could be degrading: she stood outside all degradation. This episode, which she thought so sordid, and which was so tragic for him, remained supremely beautiful. To such a height was he lifted, that without regret he could now have told her that he was her worshipper too. But what was the use of telling her? For all the wonderful things had happened.
"Thank you," was all that he permitted himself. "Thank you for everything."

Annotations to Sir Joshua Reynolds's Discourses, title page (c. 1798–1809)
1790s

The Autobiography of Calvin Coolidge, Cosmopolitan Book Corporation (1929), p. 68.
1920s

"The Contest in America," Fraser’s Magazine (February 1862); later published in Dissertations and Discussions (1868), vol.1 p. 26
Context: War is an ugly thing, but not the ugliest of things: the decayed and degraded state of moral and patriotic feeling which thinks that nothing is worth a war, is much worse. When a people are used as mere human instruments for firing cannon or thrusting bayonets, in the service and for the selfish purposes of a master, such war degrades a people. A war to protect other human beings against tyrannical injustice; a war to give victory to their own ideas of right and good, and which is their own war, carried on for an honest purpose by their free choice, — is often the means of their regeneration. A man who has nothing which he is willing to fight for, nothing which he cares more about than he does about his personal safety, is a miserable creature who has no chance of being free, unless made and kept so by the exertions of better men than himself. As long as justice and injustice have not terminated their ever-renewing fight for ascendancy in the affairs of mankind, human beings must be willing, when need is, to do battle for the one against the other.

Temer no humilla tanto como ser temido.
Voces (1943)