Hal Jordan: In brightest day, in blackest night, no evil shall escape my sight. Let those who worship evil's might, beware my power, green lantern's light.
Thomas Kalmaku: So what happens now?
Hal Jordan: I go looking for trouble.
Abin Sur: Your name?
Hal Jordan: It's Hal, Hal Jordan.
Abin Sur: The ring, it chose you. Use its power to defend our universe. Become one of us... Become a Green Lantern.
Sinestro: A great light has gone out in the universe.
Sinestro: Individually, we are vulnerable. Together, we are unstoppable!
Hal Jordan: When I'm flying, it feels like anything is possible.
Carol Ferris: Hal, you're late! This test today - it's important.
Hal Jordan: I'm going to make you look good up there. Don't worry. Now, let's get these pants off and fly some planes.
Answer: In the comics Sinestro founded and led the Sinestro Corps, a group similar to the Green Lanterns, but they use the yellow part of the emotional spectrum: fear, rather the the green energy of willpower.