You have already asked this question, in the previous thread. Anyways I have copied and pasted my reply, here it is:
Francis Bacon (1561-1626) championed the inductive method of experimental science. His works include the Essays (1597); Advancement of Learning (1605); Novum Organum (1620); and New Atlantis (1627), a utopia. The "simulator" that claims to say "Never excuse, never explain"
is not a machine, as one might be careless enough to think, but a person who simulates, who feigns to be something other than what he is, according to Essay VI, "Of Simulation and Dissimulation." Barthes has recalled Bacon imperfectly: "never excuse, never explain" is not in the essay, at least in English. Moreover, the person who is most likely to say never excuse, never explain, is not the simulator but the secretive person, who represents the fIrst degree of "hiding and veiling" that Bacon identifies: "closeness, reservation, and secrecy; when a man leaveth himself without observation, or without hold to be taken, what he is." The dissimulator is the second degree, the simulator the third.
Evelyn Waugh, Benjamin Jowett, John F. Kennedy, and several other authors are said to have written "Never apologize, never explain" or something quite similar.
http://www.quotationspage.com/forum/vie ... php?t=1184