Cassius is the one who tried to let Brutus turn against Caesar and convince Brutus to be a traitor and a betrayers. It turns out that Cassius was deeply jealous to Caesar especially that he he talks about how he save Caesar on the water, Caesar just said that he purposely do that and act like drowning. Cassius also tell Brutus how Caesar stumble over everyone and see all of them as his underlings so this mere fact makes Cassius jealous to Caesar and let Brutus joins him
