“Avoid cruelty and injustice for, on the Day of Judgment, the same will turn into several darknesses; and guard yourselves against miserliness; for this has ruined nations who lived before you.”

2006, Human Events interview (2006)

Address to the United Nations (1964)
Context: We speak out to put the world on guard against what is happening in South Africa. The brutal policy of apartheid is applied before the eyes of the nations of the world. The peoples of Africa are compelled to endure the fact that on the African continent the superiority of one race over another remains official policy, and that in the name of this racial superiority murder is committed with impunity. Can the United Nations do nothing to stop this?

Source: Rules for Radicals: A Pragmatic Primer for Realistic Radicals

Riyadh-as-Saliheen by Imam Al-Nawawi, volume 2, hadith number 203
Sunni Hadith
Variant: Jabir reported that the Messenger of Allah, may Allah bless him and grant him peace, said, "Beware of injustice. Injustice will be darkness on the Day of Rising. Beware of avarice. Avarice destroyed those before you and prompted them to shed each other's blood and make lawful what was unlawful."

Tripwire, Prologue (1999).

The Glenn Beck Program
Premiere Radio Networks
2004-05-14
Comment on Michael Berg, the father of murdered American businessman Nicholas Berg
2000s

Source: Scoundrel Time (1976), p. 82
Context: To many intellectuals the radicals had become the chief, perhaps the only, enemy. … Not alone because the radical's reasons were suspect but because his convictions would lead to a world that deprived the rest of us of what we had. Very few people were capable of admitting anything so simple. But the antiradical camp contained the same divisions: often they were honest and thoughtful men, often they were men who turned down a dark road for dark reasons.
But radicalism or anti-radicalism should have had nothing to do with the sly, miserable methods of McCarthy, Nixon and colleagues, as they flailed at Communists, near-Communists, and nowhere-near Communists. Lives were being ruined and few hands were raised in help. Since when do you have to agree with people to defend them from injustice?

3
Gospel of Thomas (c. 50? — c. 140?)
Context: If those who lead you say, 'See, the Kingdom is in the sky,' then the birds of the sky will precede you. If they say to you, 'It is in the sea,' then the fish will precede you. Rather, the Kingdom is inside of you, and it is outside of you. When you come to know yourselves, then you will become known, and you will realize that it is you who are the sons of the living Father. But if you will not know yourselves, you dwell in poverty and it is you who are that poverty.

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 102.