Note not all quotations have been tagged, so Search may find additional quotes on this topic.
A book is never finished, it is abandoned.
Gene Fowler (1890-1960) American journalist, author, and dramatist. [b. Eugene Devlan]
Quoted in H. Allen Smith, The Life and Legend of Gene Fowler, ch. 27 (1977)
(Source)
Fowler was speaking about publisher deadlines. Others have used similar phrases regarding the creative process as a whole. See Valéry and Abram.
If it weren’t for the last minute, nothing would get done.
Rita Mae Brown (b. 1944) American author, playwright Bingo (1988)
(Source)
The phrase can actually be found prior to Brown's formulation (1, 2), but Brown appears to have been the first to popularize it, and it entered into much wider use after her.
Frequent variant: "If not for the last minute ...."