Final answer:
Cassius's words "Urge me no more, I shall forget myself" reveal his flaw of impulsiveness.
Step-by-step explanation:
In the given quote, Cassius's words "Urge me no more, I shall forget myself" reveal his flaw of impulsiveness.
This can be seen in his immediate response to being urged, where he admits that he may act without thinking and lose control of himself.
His impulsiveness can lead to impulsive actions and decisions, which can have negative consequences and hinder his ability to think rationally or consider the long-term effects of his actions.