HAMLET

Then is doomsday near: but your news is not true.
Let me question more in particular: what have you,
my good friends, deserved 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' the 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.

Compare this to Protagoras' statement that each person is a scale, and to Sextus Empiricus' claim about rain and cold.