I do not begin my novel at the beginning, I do not reach chapter three before I reach chapter four, I do not go dutifully from one page to the next, in consecutive order; no, I pick out a bit here and a bit there, till I have filled all the gaps on paper. This is why I like writing my stories and novels on index cards, numbering them later when the whole set is complete. Every card is rewritten many times.

Strong opinions (ed. McGraw-Hill Companies, 1973)