What implict assumption does thoreau rely on when he discusses the relationship of money and the soul in walden

How does this image the reader to understand seismographs?

Brutus: but as he was ambitious, i slew him. . who is here so base that would be a bondman? if any, speak, for him have i offended. who is here so rude that would not be a roman? if any, speak, for him have i offended. who is here so vile that will not love his country? if any, speak, for him have i offended. i pause for a reply. which rhetorical device does brutus use in this excerpt?

The attitude the speaker in this poem holds toward himself can best be described as