I need a quote or something that I could use to compare to Romeo as a way to begin my seminar for Romeo and Juliet.I am doing a unit seminar on how...

You could definitely use a quote from the Chorus at the
beginning of Act II, to show how impulsive Romeo is.  He
says:

Now old
desire doth in his deathbed lie

And young affection gapes
to be his heir;

That fair for which love groan'd for and
would die,

With tender Juliet match'd is now not
fair.

The Chorus is making
fun of Romeo a bit here, calling his love for Rosaline "old desire" (when it really
wasn't very old in terms of years at all) and his feelings for Juliet new and "gaping"
like a baby.  You could have fun, in your presentation, with the difference between love
for Rosaline like an old tired person versus love for Juliet, which is like a little
baby.  The Chorus is a good character to use for a presentation such as yours, since he
stands outside the action commenting on it, which is what it appears you will be
doing.

By the way, the image you describe in your question
refers to "blinkers" or "blinders" that a horse wears to keep his focus on the track in
front of him when he races.

Good luck with your
presentation.