Cymbeline.

“Fear no more the heat o’ the sun

Nor the furious winter’s rages.” (Woolf 13.)

This is a quote from Act IV, Scene Two of the play Cymbeline by William Shakespeare.  Virginia Woolf uses this quote not only for its particular relevance to the themes of Mrs. Dalloway, but also because the play carries many of the same characteristics as her novel.  This quote, out of context, begs one not to fear the elements and the earth and all that they imply, being the cycles of nature, and therefore death.  This is an important theme in Mrs. Dalloway, as is time and growing old and dying. 

http://www.geocities.com/plt_2000plt_us/englam/shk-997.html

The play of Cymbeline has many parallels to Mrs. Dalloway.  Cymbeline is a King who banishes Posthumus, a man of low social standing, for secretly marrying his daughter, Imogen.  The bulk of the play deals with themes of innocence (as does Mrs. Dalloway) and deception.  The end of the play is very similar to the ending of Mrs. Dalloway; all of the characters come together to tell part of a story, to add information and points of view to it, as they do at Clarissa’s climactic party, and there is a great feast in London, also like Clarissa’s party.  Virginia Woolf may have referenced Cymbeline to transfer some of its themes of innocence and the loss thereof to her novel.

http://www.globe-theatre.org.uk/summary-of-cymbeline-and-characters.htm