Final answer:
Cassius convinces Brutus of Caesar's lack of honor by exposing Caesar's weaknesses and ambitions, and by implying that Caesar could harm Rome if given too much power.
Step-by-step explanation:
Cassius attempts to persuade Brutus that Caesar is not a man of honor by pointing out his weaknesses and portraying him as an ambitious figure who cannot be trusted with power. He highlights instances that question Caesar's strength, health, and merit, contrasting them with the idea that such a man should not be given the power or respect of a king, warning that Rome could suffer under his rule. Details from Shakespeare’s play “Julius Caesar” show Cassius illustrating Caesar's human frailties - such as his susceptibility to sickness and his desire for adulation - to reinforce his argument that Caesar is not the demigod that many Romans believe him to be.