“What you can't get out of, get into wholeheartedly. ”

Source: The Blind Assassin

Interview with Gary K. Wolfe (28 July 1987), quoted in Harlan Ellison : The Edge of Forever (2002), by Ellen Weil and Gary K. Wolfe
Borrowing a common scientific joke expressing the laws of thermodynamics.

This saying was popularized by Truman after he publicly used it in 1952. It was soon credited to his aide Harry H. Vaughan in TIME (28 April 1952) but apparently originated with a Missouri colleague of Truman, Eugene "Buck" Purcell, according to The Quote Verifier: Who Said What, Where, And When (2006) by Ralph Keyes. Truman himself later made reference to his popularization of the remark in his book Mr. Citizen (1960), p. 229:
: There has been a lot of talk lately about the burdens of the Presidency. Decisions that the President has to make often affect the lives of tens of millions of people around the world, but that does not mean that they should take longer to make. Some men can make decisions and some cannot. Some men fret and delay under criticism. I used to have a saying that applies here, and I note that some people have picked it up, "If you can't stand the heat, get out of the kitchen."
Misattributed

Hazey Jane II
Song lyrics, Bryter Later (1970)

Several publications attribute the quote to Ginsberg, probably the first one is The Coevolution Quarterly in 1975 [Google books https://books.google.it/books?id=MylJAQAAIAAJ&q=%22ginsberg%27s+theorem%22&dq=%22ginsberg%27s+theorem%22&hl=en&sa=X&redir_esc=y], but there's is no evidence whatsoever that he ever pronounced it. A more detailed analysis can be found in this post https://www.barrypopik.com/index.php/new_york_city/entry/you_cant_win_you_cant_break_even/
Misattributed, Ginsberg's theorem

1974 speech, in Voices of Multicultural America: Notable Speeches Delivered by African, Asian, Hispanic and Native Americans, 1790-1995 by Deborah Gillan Straub

Television, Inside the Actor's Studio (2006)