A central idea of a text is the author's overall idea that is presented throughout the text that is thoroughly supported.
I think in think in this particular quote there shows pride as after Julius Caeser there is the addition of "first roman that came into Britain" this also indicates the authority of Julius Caesur as that becomes like a title
Paradox
A fire department is a place where firefighters train but it's ironic beacuse it's being burnt down.
