A mind not to be changed by place or time.
The mind is its own place, and in itself
Can make a heaven of hell, a hell of heaven.

echo了哈姆雷特里的：

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.
ROSENCRANTZ
Why then your ambition makes it one. ’Tis too narrow for your mind.
HAMLET
O God, I could be bounded in a nutshell, and count myself a king of infinite space—were it not that I have bad dreams.
GUILDENSTERN
Which dreams indeed are ambition, for the very substance of the ambitious is merely the shadow of a dream.
HAMLET
A dream itself is but a shadow.