Grey´s Anatomy (8)

Meredith: Human beings need a lot of things to feel alive.
George: Family . . .
Cristina: Love . . .
Izzie: Sex.
Derek: But we only need one thing . . .
Burke: To actually be alive.
Cristina: We need a beating heart.
Addison: When our heart is threatened . . .
Alex: we respond in one of two ways.
George: We either run or . . .
Izzie: we attack.
Chief: There's a scientific term for this:
Alex: Fight . . .
Addison: or flight.
Bailey: It's instinct . . .
Meredith: We can't control it.
Izzie: Or can we?