Grey's Anatomy, Season 6

Derek:
[voiceover] Ask most surgeons why they became surgeons and they usually tell you the same thing. It was for the high, the rush, the thrill that comes from cutting someone open and saving their life. For me it was different, maybe it was because I grew up in a house with four sisters. No, definitely because I grew up in a house with four sisters because it was the quiet that drew me to surgery. The operating room is a quiet place. Peaceful. It has to be in order for us to stay alert, anticipate complications. When you stand in the OR, your patient open on the table, all the world's noise, all the worry that it brings disappears. A calm settles over you, time passing without thought. For that moment, you feel completely at peace.