dark side

Beware of the Dark Side.  Anger, Fear, Agression.  The Dark Side of the Force are they.  Easily they flow.  Quick to join you in a fight.  If once you start down the Dark Path, forever will it dominate your destiny.  Consume you it will.

"What's in there?" Questioned Luke, "Only what you take with you." Answered Master Yoda.
(About the dark side and fear)