“But we must never adjust to the present coarseness of our national dialogue with the tone set up at the top. We must never regard as normal the regular and casual undermining of our democratic norms and ideals. We must never meekly accept the daily sundering of our country. The personal attacks, the threats against principles, freedoms and institution, the flagrant disregard for truth and decency.The reckless provocations, most often for the pettiest and most personal reasons, reasons having nothing whatsoever to do with the fortunes of the people that we have been elected to serve. None of these appalling features of our current politics should ever be regarded as normal. We must never allow ourselves to lapse into thinking that that is just the way things are now.”

2000s, 2001, First inaugural address (January 2001)

1950s, Give Us the Ballot (1957)
Context: This is no day for the rabble-rouser, whether he be Negro or white. We must realize that we are grappling with the most weighty social problem of this nation, and in grappling with such a complex problem there is no place for misguided emotionalism. We must work passionately and unrelentingly for the goal of freedom, but we must be sure that our hands are clean in the struggle. We must never struggle with falsehood, hate, or malice. We must never become bitter. I know how we feel sometime. There is the danger that those of us who have been forced so long to stand amid the tragic midnight of oppression—those of us who have been trampled over, those of us who have been kicked about—there is the danger that we will become bitter. But if we will become bitter and indulge in hate campaigns, the new order which is emerging will be nothing but a duplication of the old order.

Vol. I, p. 402
William Lloyd Garrison 1805-1879 (1885)

As quoted in "America's Next Top Fearmonger: The presidential candidates compete to scare the daylights out of the U.S. public." http://nationalinterest.org/feature/america%E2%80%99s-next-top-fearmonger-12954 (22 May 2015), by Robert Golan-Vilella, National Interest
2010s

29 January 2019 https://twitter.com/JoeBiden/status/1090422326783606784 by Joe Biden
About, January 2019

Twitter https://twitter.com/JoeBiden/status/1090422326783606784, , quoted in * 2019-02-21 Jussie Smollett Supporters: Rooting for a 'Modern Lynching' Larry Elder RealClearPolitics

https://www.realclearpolitics.com/articles/2019/02/21/jussie_smollett_supporters_rooting_for_a_modern_lynching_139531.html 2020-03-12

Ref: en.wikiquote.org - Joe Biden / Quotes / 2010s / 2019
2019

Source: Communion: The Female Search for Love

"The War Speeches of William Pitt", Oxford University Press, 1915, p. 16
Speech in the House of Commons, 17 February 1792, introducing the Budget. His prediction was a vain hope.

2000s, 2009, Farewell speech to the nation (January 2009)