As You Like It Act III, Scene ii

"[Aside to CELIA]  I will speak to him like a saucy lackey, and under that habit play the knave with him." - Rosalind.

This is the part of the play that I didn't really understand.  There are only two positive things I can think of that was gained from  Rosalind pretending to be a man while in the presence of Orlando was that she could work and groom him into realizing what is considered modest and what is not considered modest when it comes to how he treats women.  In addition to this, though, Rosalind's disguise contributes to one of the themes of the play.  It contributes to the theme that states that things are not always as they may appear.  Everyone who was around Rosalind thought that she was a man.  In reality, she was a woman pretending to be a man.  Other than these positive aspects, I do not really understand the point of her pretending to be a man while around Orlando.  In fact, there were also some negative aspects to Rosalind's plan.  For one, Phebe actually ends up falling in love with Rosalind because she believes she is a man.