“The scales of justice are in disarray[…]”

On slavery, in a letter to John Holmes (22 April 1820)
1820s

in "The Cost of Modern Sentiment" (1916)

Energy and the Common Purpose, 3rd ed. (2007), p. 39 http://www.theleaneconomyconnection.net/downloads.html#TEQs

2013, "Let Freedom Ring" Ceremony (August 2013)
Context: To dismiss the magnitude of this progress -- to suggest, as some sometimes do, that little has changed -- that dishonors the courage and the sacrifice of those who paid the price to march in those years. Medgar Evers, James Chaney, Andrew Goodman, Michael Schwerner, Martin Luther King Jr. -- they did not die in vain. Their victory was great. But we would dishonor those heroes as well to suggest that the work of this nation is somehow complete. The arc of the moral universe may bend towards justice, but it doesn’t bend on its own. To secure the gains this country has made requires constant vigilance, not complacency. Whether by challenging those who erect new barriers to the vote, or ensuring that the scales of justice work equally for all, and the criminal justice system is not simply a pipeline from underfunded schools to overcrowded jails, it requires vigilance. And we'll suffer the occasional setback. But we will win these fights. This country has changed too much. People of goodwill, regardless of party, are too plentiful for those with ill will to change history’s currents.

Centennial Oration (4 July 1876) http://www.infidels.org/library/historical/robert_ingersoll/centennial_oration.html

The Progress of Fifty Years (1893)
Context: By what toil and fatigue and patience and strife and the beautiful law of growth has all this been wrought? These things have not come of themselves. They could not have occurred except as the great movement for women has brought them out and about. They are part of the eternal order, and they have come to stay. Now all we need is to continue to speak the truth fearlessly, and we shall add to our number those who will turn the scale to the side of equal and full justice in all things.

Faults, Scaling and Erlang concurrency

Source: The Testament of Jessie Lamb (2011), Chapter 18 (p. 137)

Source: The Best of All Possible Worlds (2006), Chapter 2, The Birth of Modern Science, p. 34.