To thoreau, what is stronger than prison

Henry David Thoreau was an American philosopher who spent time in jail as a display of Civil disobedience, arguing that all citizen have a civil responsibility to challenge injustice.

But his experience in jail did not hurt his spirit; he certainly applied one of his famous quotes "This world is but a canvas to our imagination" so what is stronger than prison is a person's free mind.

answer :

in act 3, scene 3 of hamlet, claudius, in his prayer, says that he "cannot" be forgiven for his "foul murder" because he cannot give up the things for which he murdered.

the queen does not feature in the list of things that claudius cannot give up. claudius married gertrude only to use her as a means to achieve his goals. he never loved her or cared about her. she is of no value to him anymore. claudius only wished for the throne, the wealth, and the power and murdering hamlet's father allowed him to have a right over all these things.