The last main theme of the play I would like to tell you about is time. Time plays an extremely important role right from the beginning. Every major event in the play had something to do with wrong timing. For example it was a coincidence that the Capulets and the Montagues met each other on the streets and their brawl started. It was only a coincidence that Romeo and Juliet met at the party where there were hundreds of people and they fell in love. It was oly a coincidence that Romeo got the Juliet´s tomb and had time to kill himself. See, many of the main events were about being at the right place and the right time or perhaps being at the wrong place at the wrong time (this refers to all the killing in the play). What´s also important is that this story in no longer than one week. In only a several days Romeo forget about Rosaline, fell in love with Juliet, got married, killed Tybalt, was banished from Verona and even died. An example from the play refering to time is Romeo´s quote "O swear not by the moon, th'inconstant moon,  that monthly changes in her circled orb, lest that thy love prove likewise variable." Also it would be a shame to not tell you at least something about the duality of the play. By duality I mean the contasts between light and dark especially day and night. What is interesting is that light does not alwas refer to good and dark does not alwas refer to bad. On the contrary, most positive events happen at night and most negative events happen at daytime. Here you have a quote in which you do not see the contrast of day and night but only an ordinary one:
"O brawling love, O loving hate,
O any thing of nothing first create!
O heavy lightness, serious vanity,
Misshapen chaos of well-seeming forms,
Feather of lead, bright smoke, cold fire, sick health,
Still-waking sleep, that is not what it is!."