Classic Poem

Why I tie about thy wrist,
Julia, this my silken twist;
For what other reason is't,
But to show thee how, in part,
Thou my pretty captive art?
But thy bondslave is my heart;
'Tis but silk that bindeth thee,
Knap the thread and thou art free:
But 'tis otherwise with me;
I am bound, and fast bound, so
That from thee I cannot go;
If I could, I would not so.