Grey's Anatomy, Season 2

Meredith:
[voiceover] When you were a kid, it was Halloween candy. You hid it from your parents and ate it until you got sick. In college, it was the heavy combo of youth, tequila and well, you know. As a surgeon, you take as much of the good as you can get because it doesn't come around nearly as often as it should. 'Cause good things aren't always what they seem. Too much of anything, even love, is not always a good thing.