When you realize that staying at your day job causes you to make less money than if you quit.

Coined by Randall Munroe, of xkcd fame, regarding such a realization by Terry Pratchett.
Terry Pratchett quit his job as a press officer for the Central Electricity Generating Board when he reached his Pratchett Point with writing full time.
by Jewbot9000 August 8, 2009
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