Henry spends most of his speech arguing against hope, ordinarily not the best tactic when trying to inspire an audience. how does he manage to discredit hope? why would he do this?

In Patrick Henry's infamous speech in the Virginia Convention, he states that colonists should not have hope in Britain and not trust that emotion, as the aim of his speech was to speak out against England, encouraging war, notably describing this as an upcoming "storm" with the war against the English.