“In general, they do what you want, unless you want consistency.”
In the perl man page.
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Larry Wall 294
American computer programmer and author, creator of Perl 1954Related quotes

“Do you want to be what you are or do you want to be what continually changes what you are?”
2017 Maps of Meaning 11: The Flood and the Tower. https://www.youtube.com/watch?v=T4fjSrVCDvA
Maps of Meaning
Source: Dreamsnake (1978), Chapter 9 (p. 205)

“As you cannot do what you want,
Want what you can do”

Source: "As I Please," Tribune, (24 December 1943)
LiNK’s Hannah Song: Forever Committed to a Cause https://web.archive.org/web/20160414025408/ttp://www.mochimag.com/article/links-hannah-song-forever-committed-to-a-cause (2010)

“Buy not what you want, but what you have need of; what you do not want is dear at a farthing.”
Emas non quod opus est, sed quod necesse est. Quod non opus est, asse carum est.
As quoted by Seneca (Epistles, 94)