Cassius thinks Caesar is too ambitious. This is a metaphor which means that Caesar isn't fit to be a ruler. He is getting too old
"So often shall the knot of us be call'd the men that gave their country liberty"
Cassius thinks that they are going to be remembered but he is being ambitious because he wants to be remembered. He wants to be seen as a leader. Cassius sees killing Caesar is a duty to Rome
"This man is now becoming a God .. nod on him"
Cassius thinks that Caesar is becoming arrogant. However, Cassius is being ambitious as he wants to be more powerful than Caesar
