William Shakespeare
Two Gentlemen of Verona Act 4 Scene 2
   SCENE II. Milan. Outside the DUKE's palace, under SILVIA's chamber.

      Enter PROTEUS

PROTEUS
      Already have I been false to Valentine
      And now I must be as unjust to Thurio.
      Under the colour of commending him,
      I have access my own love to prefer:
      But Silvia is too fair, too true, too holy,
      To be corrupted with my worthless gifts.
      When I protest true loyalty to her,
      She twits me with my falsehood to my friend;
      When to her beauty I commend my vows,
      She bids me think how I have been forsworn
      In breaking faith with Julia whom I loved:
      And notwithstanding all her sudden quips,
      The least whereof would quell a lover's hope,
      Yet, spaniel-like, the more she spurns my love,
      The more it grows and fawneth on her still.
      But here comes Thurio: now must we to her window,
      And give some evening music to her ear.

      Enter THURIO and Musicians

THURIO
      How now, Sir Proteus, are you crept before us?