These violent delights have violent ends
And in their triump die, like fire and powder
Which, as they kiss, consume

The sweetest honey is loathsome in its own deliciousness. And in the taste destroys the appetite. Therefore, love moderately.

To move is to stir, and to be valiant is to stand; therefore, if tou art mov'd, thou runst away. (To be angry is to move, to be brave is to stand still. Therefore, if you're angry, you'll run away.)

what ho, apothecary!

Well, in that hit you miss. She'll not be hit
With Cupid's arrow. She hath Dian's wit,
And, in strong proff of chastity well armed,
From Love's weak childish bow she lives uncharmed.
She will not stay the siege of loving terms,
Nor bide th' encounter of assailing eyes,
Nor ope her lap to saint-seducing gold.
O, she is rich in beauty; only poor
That, when she dies, with dies her store.
Act 1,Scene 1, lines 180-197

Romeo:
If I profane with my unworthiest hand
This holy shrine, the gentle fine is this:
My lips, two blushing pilgrims, ready stand
To smooth that rough touch with a tender kiss.

Juliet:
Good pilgrim, you do wrong your hand too much,
Which mannerly devotion shows in this;
For saints have hands that pilgrims' hands do touch,
And palm to palm is holy palmers' kiss.

Romeo:
Have not saints lips, and holy palmers too?

Juliet:
Ay, pilgrim, lips that they must use in prayer.

Romeo:
O, then, dear saint, let lips do what hands do;
They pray, grant thou, lest faith turn to despair.

Juliet:
Saints do not move, though grant for prayers' sake.

Romeo:
Then move not, while my prayer's effect I take.
Thus from my lips, by yours, my sin is purged.

Juliet:
Then have my lips the sin that they have took.

Romeo:
Sin from thy lips? O trespass sweetly urged!
Give me my sin again.

Juliet:
You kiss by the book.