What is the meaning of the following quote from Romeo and Juliet?: "My only love sprung from my only hate! Too early seen unknown, and known too late!"

speaks these lines in act 1, scene 5 a short time after meetingfor the first time, holding hands
with him, kissing him, and falling absolutely in love with him at first sight. It's only after
Romeo has left the Capulet's masked ball that Juliet thinks to find out who he is.

had only to hear Romeo's voice to know who he was, even though Romeo was wearing a
mask; but, as unlikely as it might seem sincehave lived in Verona their entire lives, Juliet has
never seen, spoken with, or even heard of Romeo before she met him at the Capulet's party that
evening. Apparently, Juliet doesn't get out of the Capulet house very much, or speak with anyone
who comes to the house, or speak to anybody who does get out of the house, except for the
Nurse.

To be fair to Juliet, Romeo didn't ask Juliet's name, either. (In
fact, Romeo is never told her name, but somehow he knows her name two scenes later in the
"balcony scene.")

It seems odd, though, that at a party at the
Capulet...