Lisa Marie Simpson, voiced by Yeardley Smith, is Homer and Marge's oldest duaghter and the middle child on The Simpsons. Lisa is very intelligent, plays the saxophone, is a vegetarian, Buddhist, and definitely a bit of a young political activist. She's basically the complete opposite of her brother, Bart.
(Lisa tries to teach Bart a method to clear his mind of distraction.)
Lisa: Bart, I have a riddle for you. What's the sound of one hand clapping?
Bart: Piece of cake.
(Bart opens and closes his right fist quickly, making a sound.)
Lisa: No, Bart. It's a 3000-year-old riddle with no answer. It's supposed to clear your mind of conscious thought.
Bart: No answer? Lisa, listen up.
(Bart quickly opens and closes his fist again.)
Lincoln, Lincoln. I've been thinkin'. What the hell have you've been drinkin'? Is it water? Is it wine? Oh, my gosh. It's turpentine!Bart & Lisa