I Think I'll Sit This One Out (1939)
Context: Justice alone knows liberty, equality, and fraternity, and justice is a human virtue arising from man's human capacity to reason. We cannot make sense out of justice by looking at the moon or taking dope or building battleships. We can make sense out of justice by using our reason to discover that justice, like wisdom, is better than rubies.
“The sense of justice and injustice is not deriv'd from nature, but arises artificially… from education, and human conventions.”
Part 2, 1.17
A Treatise of Human Nature (1739-40), Book 3: Of morals
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David Hume 138
Scottish philosopher, economist, and historian 1711–1776Related quotes

Source: (1776), Book I, Chapter II, p. 17.

Grundrisse (1857-1858)
Source: Notebook I, The Chapter on Money, p. 85.

Roosevelt here slightly misquotes Thomas Babington Macaulay, who in a speech on parliamentary reform (2 March 1831) asserted: "The voice of great events is proclaiming to us, Reform, that you may preserve."
1930s, Address at the Democratic State Convention, Syracuse, New York (1936)
Context: The true conservative seeks to protect the system of private property and free enterprise by correcting such injustices and inequalities as arise from it. The most serious threat to our institutions comes from those who refuse to face the need for change. Liberalism becomes the protection for the far-sighted conservative.
Never has a Nation made greater strides in the safeguarding of democracy than we have made during the past three years. Wise and prudent men — intelligent conservatives — have long known that in a changing world worthy institutions can be conserved only by adjusting them to the changing time. In the words of the great essayist, "The voice of great events is proclaiming to us. Reform if you would preserve." I am that kind of conservative because I am that kind of liberal.
“There is a human tendency to desire and even artificially create a sense of certainty.”

Shouting Fire: Civil Liberties in a Turbulent Age, Little, Brown & Company, New York, NY, (2002) p. 4

“Injustice often arises also through chicanery, that is, through an over-subtle and even fraudulent construction of the law. This it is that gave rise to the now familiar saw, "More law, less justice."”
Existunt etiam saepe iniuriae calumnia quadam et nimis callida sed malitiosa iuris interpretatione. Ex quo illud "summum ius summa iniuria" factum est iam tritum sermone proverbium.
Book I, section 33; translation by Walter Miller.
De Officiis – On Duties (44 BC)

Ten Sermons of Religion (1853), III : Of Justice and the Conscience https://en.wikisource.org/wiki/Ten_Sermons_of_Religion/Of_Justice_and_the_Conscience
Context: The people are not satisfied with any form of government, or statute law, until it comes up to their sense of justice; so every progressive State revises its statutes from time to time, and at each revision comes nearer to the absolute right which human nature demands. Mankind, always progressive, revolutionizes constitutions, changes and changes, seeking to come close to the ideal justice, the divine and immutable law of the world, to which we all owe fealty, swear how we will.

Letter (30 July 1947), p. 46
Attributed in posthumous publications, Albert Einstein: The Human Side (1979)