Hamlet:
What have you, my good friends, deserv'd at the hands of
Fortune, that she sends you to prison hither?

Guildenstern:
Prison, my lord?

Hamlet:
Denmark's a prison.

Rosencrantz:
Then is the world one.

Hamlet:
A goodly one, in which there are many confines, wards, and
dungeons, Denmark being one o' th' worst.

Rosencrantz:
We think not so, my lord.

Hamlet:
Why then 'tis none to you; for there is nothing either good or
bad, but thinking makes it so. To me it is a prison.
Hamlet Act 2, scene 2, 239–251