Sister referred to paraphrase Rev. Jesse Jackson:

"The cautionary tale is a timely one. It reminds us, as the Rev. Jesse Jackson once pointed out, that it is very easy to go along to get along."

I unfortunately could not find any other source even to that quote through searching the web. Only the National Catholic Reporter article had that. I’m guessing for her, the sentiment of knowing much about Jesse Jackson is common knowledge of who he is and what he has said in the past that could be summarized as “very easy to go along to get along.” But that is just a guess based on the cultural attitude and norm of his own point of view. Other than that, there’s not an actual quote listed/sourced in her article.