“The fact is, as actors, everything we do, bad or good, is a contribution. To me, it is a positive thing to give people as wide a range of human behavior with some sense of understanding of that behavior or some clue to it. It may be a very small thing in terms of the problems that exist in the world, but it is a thing, and it's something I can do, and like to do—am thrilled to do actually.”
Grace Zabriskie: Methodical Madness https://www.backstage.com/magazine/article/grace-zabriskie-methodical-madness-42678/ (June 26, 2001)
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Grace Zabriskie 1
American actress 1941Related quotes

Betsy Pickle (December 17, 1999) "If there's a mouse, call Lane - Actor didn't 'paws' before taking on film", The Knoxville News-Sentinel, p. 4.

In an interview with Kara Swisher as quoted in Zuckerberg: The Recode interview https://www.recode.net/2018/7/18/17575156/mark-zuckerberg-interview-facebook-recode-kara-swisher (July 18, 2018), Recode.

Source: "King Bhumibol's Reign" in The New York Times https://www.nytimes.com/1989/05/21/magazine/king-bhumibol-s-reign.html (21 May 1989)

“The world is full of good people who do bad things!”
Blue Like Jazz (2003, Nelson Books)

Presumably a paraphrase of "A peculiar virtue in wildlife ethics is that the hunter ordinarily has no gallery to applaud or disapprove of his conduct" or of "Hunting for sport is an improvement ..." above.
Unlikely to be by Leopold, who knew that ethics involves not only doing the right thing, but also determining the right thing in the face of competing desirable criteria.
Misattributed