“Don't trust anybody who'd rather be grammatically correct than have a good time.”

Source: The Prince (1513), Ch. 3 (as translated by RM Adams). Variants [these can seem to generalize the circumstances in ways that the translation above does not.]: The Romans, foreseeing troubles, dealt with them at once, and, even to avoid a war, would not let them come to a head, for they knew that war is not to be avoided, but is only put off to the advantage of others.
There is no avoiding war; it can only be postponed to the advantage of others.
Context: The Romans never allowed a trouble spot to remain simply to avoid going to war over it, because they knew that wars don't just go away, they are only postponed to someone else's advantage. Therefore, they made war with Philip and Antiochus in Greece, in order not to have to fight them in Italy... They never went by that saying which you constantly hear from the wiseacres of our day, that time heals all things. They trusted rather their own character and prudence — knowing perfectly well that time contains the seeds of all things, good as well as bad.

Vorkosigan Saga, Barrayar (1991)

Source: Zen and the Art of Motorcycle Maintenance: An Inquiry Into Values

As quoted by Lewis Nichols http://www.nytimes.com/1982/04/30/obituaries/lewis-nichols-times-drama-critic-during-world-war-ii-dead-at-78.html in "Talk With Jim Bishop" http://query.nytimes.com/gst/abstract.html?res=9F03EEDE133AE53BBC4E53DFB466838E649EDE, The New York Times (6 February 1955).

Re: is CLOS reall OO? http://groups.google.com/group/comp.lang.lisp/msg/07310c842fea847c (Usenet article).
Usenet articles, C++

Source: Desert Flower

Liza Minelli, interviewed by Gene Shalit in the September 1977 issue of The Ladies Home Journal, as quoted in "Women in the News," https://news.google.com/newspapers?id=yXMjAAAAIBAJ&sjid=a2cEAAAAIBAJ&pg=5851%2C3647577 in The Sarasota Herald-Tribune (August 24, 1977), p. 6-D
Variant: But I'd rather be a first-rate version of myself than a second-rate version of somebody else.
Context: I don't sing them because I couldn't sing them as well as she did. I'd rather be a first-rate version of myself than a second-rate version of anybody.

Source: What I Talk About When I Talk About Running