“Do what I will never do.”

Source: Everybody’s Autobiography (1937), Ch. 3

Variant: And what will I be able to do tomorrow that I cannot yet do today?
Source: Eat, Pray, Love

As quoted in Encyclopedia of World Biography (1998) edited by Paula Kay Byers and Suzanne Michele Bourgoin, Vol. Hox-Kie‎, p. 504

Source: The Picture of Dorian Gray

Interview with the Fiji Times http://www.Fijitimes.com, 25 September 2005 (excerpts)

Middlemarch (1871)

Source: Northanger Abbey

When asked "Do you personally dislike homosexuals?", as quoted in Uganda president: Homosexuals are 'disgusting' http://edition.cnn.com/2014/02/24/world/africa/uganda-homosexuality-interview/index.html?sr=fb022414ugandapresident7p (25 February 2014), by Elizabeth Landau, Zain Verjee, and Antonia Mortensen, CNN
2010s

Source: Isaiah's Job (1936), IV
Context: In any given society the Remnant are always so largely an unknown quantity. You do not know, and will never know, more than two things about them. You can be sure of those — dead sure, as our phrase is — but you will never be able to make even a respectable guess at anything else. You do not know, and will never know, who the Remnant are, nor what they are doing or will do. Two things you do know, and no more: First, that they exist; second, that they will find you. Except for these two certainties, working for the Remnant means working in impenetrable darkness; and this, I should say, is just the condition calculated most effectively to pique the interest of any prophet who is properly gifted with the imagination, insight and intellectual curiosity necessary to a successful pursuit of his trade.