What side of Cassius' character is seen for he first time?

" So oft as that shall be,

So often shall the knot of us be called

“The men that gave their country liberty.”

http://www.sparknotes.com/shakespeare/juliuscaesar/canalysis.html

Let us know what YOU THINK.

It sounds to me that Cassius is slowly becoming controlling because Cassius suggests to kill Antony as well but then Brutus allows him to wrongfully speak at the funeral. Not controlling per say but having a bit of will power and trying to speak for his own.

Sorry ... I didn't give you the link I intended.

Cassius - A talented general and longtime acquaintance of Caesar. Cassius dislikes the fact that Caesar has become godlike in the eyes of the Romans. He slyly leads Brutus to believe that Caesar has become too powerful and must die, finally converting Brutus to his cause by sending him forged letters claiming that the Roman people support the death of Caesar. Impulsive and unscrupulous, Cassius harbors no illusions about the way the political world works. A shrewd opportunist, he proves successful but lacks integrity.
http://www.sparknotes.com/shakespeare/juliuscaesar/characters.html

So in other words, the quote express's that Cassius is a sly man and not a trustworthy partner. He is a sneak and a shrewd opportunist. I am correct?

I think you're right.

Thank You!!

You're welcome!