“I've made out a will: I'm leaving myself
to the National Health. I'm sure they can use
the jellies and tubes and syrups and glues…”

The Paris Review interview (1958)

"Robert Anton Wilson on Wilhelm Reich" (March 1995) http://www.wilhelmreichinhell.com/rawonreich.htm
Context: I'm using myself as a typical 20th century model as I'm trying to make sense out of the world around me … typical in the sense of being one of the damn good models around these days. I am typical in the sense that... a lot of people are on the same wave length as me. I get fan mail from people that are absolutely stunned that there's somebody else besides themselves who thinks this way. So, we're a minority, but there are a lot of us. On a planet this overcrowded, a minority can have a few million numbers. … More scientific than religious. More open than dogmatic. More optimistic than pessimistic. More future oriented than past oriented. And more humorous than serious. I really dread serious people. Especially serious, dogmatic people. I regard them as sort of what Reich called the emotional plague. I regard them as very dangerous.

Source: Flowers for Algernon

The All-Pro Diet: Lose Fat, Build Muscle, and Live Like a Champion (Rodale Books, 2009), Introduction https://books.google.it/books?id=wNrj-ITuL7gC&pg=PR11.

Source: I Am the Messenger

2010s, 2016, June

Quoted by Chan Norris, "Orson Welles on Latin America". PM, September 13, 1942, page 17.

Personal motto, on the title page.
Variants: Be sure that you are right, and then go ahead.
As quoted in David Crockett: His Life and Adventures (1874) by John Stevens Cabot Abbott, who indicates that he also often used simply "Go ahead!" as a battle cry, and general assertion of determination.
Unsourced variants: Be always sure you are right — then go ahead.
Be sure you are right — then go ahead.
Always be sure you are right — then go ahead.
A Narrative of the Life of David Crockett (1834)

Still Life with Woodpecker (1980)