How does cassius convince brutus to turn against caesar?

On the day of the feast of the Lupercal, Caesar walks among the people, receiving the glory from recent triumphs in battle. He lusts for power and has recently indicated his desire to be the emperor of Rome. There are many factions that do not want this kind of ruler.

Cassius encounters Brutus outside of the arena where the celebration is happening. Brutus appears troubled which seems the perfect time for Cassius to lay his plan before Brutus. He tells Brutus that he has been worried about him. Brutus answers that he is "at war with himself."

When Brutus hears the crowd cheering, he states that he is afraid that they are offering Caesar the crown. This inspires Cassius to share his feelings with Brutus.

Cassius begins by flattering Brutus. He tells Brutus that he is as good as Caesar and a most honorable man. He then proceeds to explain what has happened to create in Cassius this hatred for Caesar.