A large magnet. A magnet, regardless of type, is quite heavy. Especially if it's a rather dense one because it'll weight more because of more mass occupying a small space. It's a magnet because of the box's attraction to the steel table rather than concrete. Magnets attract metals instead of concrete.
The lines represent how passionate a person’s emotion can be
when they are chasing for the ideal of justice, it reflects how Romanticism
defines another form of passion through the poem.
