Herbert N. Casson in: The Office Economist (1935) Vol. 17-21. p. 145
1920s-1940s
“You must intervene. You must interfere. And that is actually the motto of human rights.”
Commencement ceremony http://piermarton.info/elie-wiesel-do-not-stand-idly-by-if-you-witness-injustice/ (Class of 2011) at Washington University in St. Louis.
Context: The greatest commandment to me in the Bible is not the Ten Commandments. (First of all, it’s too difficult to observe; second, we all pretend to observe.) My commandment is ‘Thou shall not stand idly by.’ Which means, when you witness an injustice: Don’t stand idly by. When you hear of a person or a group being persecuted: Do not stand idly by. When there is something wrong with the community around you or far away: Do not stand idly by. You must intervene. You must interfere. And that is actually the motto of human rights.
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Elie Wiesel 155
writer, professor, political activist, Nobel Laureate, and … 1928–2016Related quotes

Source: Life with the painters of La Ruche, Vorobëv Marevna, Macmillan, New York, 1972, p. 156.
reacting to the husband of his model a railway gate-keeper; his wife had to pose a second session for Soutine's painting 'The siesta', in 1934

Love – That’s All Cary Grant Ever Thinks About (1964)

“You must do right before you feel good.”

“You must never be fearful of what you are doing when it is right.”

Presidency (1977–1981), Inaugural Address (1977)
Context: We have already found a high degree of personal liberty, and we are now struggling to enhance equality of opportunity. Our commitment to human rights must be absolute, our laws fair, our natural beauty preserved; the powerful must not persecute the weak, and human dignity must be enhanced.