In Plain Sight, Season 4

Mary:
[voiceover] Scientists and scholars and poets and priests can argue the particulars, but who's to say, really, how children raised in the exact same house can turn out to be so drastically different? Forget nature or nurture. My guess is it's the luck of the draw. And that's the scary part. How smart they are, if they can read a map, or carry a tune, it's mostly out of your hands. Just add water and hope for the best. Because in the end, as it is in the beginning, a child is going to be who a child is going to be. All it'll be for sure is a reminder, a constant reminder of who you are, and where you've been, and how far you have to go.