Cassius flatter Brutus to convince him that they are friends and further in the story make him part of the plot to kill Caesar.
Explanation:
In Act I, Scene II Cassius asks Brutus if he can see his own face as the rest of the people sees him. He wanted to convince him that the people loved him and would support him as a ruler instead of Caesar.
By emphasizing something it makes it easier with transition words and it clarifies statements when they get started for example in the body of a paragraph.
