The first quote that proves Juliet is impatient is found in Act 2, scene 2 during the balcony scene. After she tells Romeo not to swear his love on the moon because it is not constant, she decides that the best wasy for him to swear his love to her would be to marry her. Juliet reveals this when she says,
"If that thy bent of love be honourable,
Thy purpose marriage, send me word to-morrow,
By one that I'll procure to come to thee,
Where and what time thou wilt perform the rite;" (A. 2, s. 2, lines 149-152)
The second time that she proves her impatience is when she is awaiting the Nurse's arrival with information on her wedding with Romeo. Juliet states,
"The clock struck nine when I did send the nurse;
In half an hour she promis'd to return.
Perchance she cannot meet him. That's not so..." (A.2, s. 5, lines 1-3)
She continues this impatience throughout the first 17 lines of the play.
Like Romeo, Juliet is almost beside herself with the desire to be married. In Act 2, scene 5, Shakespeare uses this to build suspense and to offer an undertow of wry commentary about the passionate impatience of young people. In a scene that several times reveals her impatience, Juliet has to wait three hours for her Nurse, and as a result she almost jumps out of her skin, attacking "old folks" for being too slow. Juliet states:
Now is the sun upon the highmost hillOf this day’s journey, and from nine till twelveIs three long hours, yet she is not come.Had she affections and warm youthful blood,She would be as swift in motion as a ball.My words would bandy her to my sweet love,And his to me.But old folks, many feign as they were dead,Unwieldy, slow, heavy, and pale as lead.
How art thou out of breath when thou hast breathTo say to me that thou art out of breath?The excuse that thou dost make in this delayIs longer than the tale thou dost excuse.
Gallop apace, you fiery-footed steeds,Toward Phoebus' lodging. Such a wagonerAs Phaeton would whip you to the westAnd bring in cloudy night immediately. . . .Come, night. Come, Romeo.