Viola's Quote

Viola(II.ii.25) "I am the man."

When Viola says this line, she is speaking to herself. She had just met with Olivia, and was disguised as the man known as Cesario. When Viola is leaving, Malvolio comes and returns a ring that Viola gave to Olivia on Orsino's behalf. This is when Viola realizes that it wasn't Orsino's "ring" (I took this ring as a symbol of Orsinos heart)that Olivia has fallen for, but that Olivia is now in love with Viola. Viola isn't a women, she is "the man" who Olivia wants. This is when we see the love triangle between Orsino, Olivia and Viola start to form.