Jason Kottke:

...Author Elizabeth Stone once wrote that having kids was deciding to "have your heart go walking around outside your body". Steve Jobs put it similarly: your children are "your heart running around outside your body". That's the truest sentiment I've ever read about parenting; it feels exactly like that to me. Reading Eric's writing about Rebecca, a girl so close in age to both my kids, has affected me greatly. That could be me. My kids suffering. My heart, broken and dying. Imagining one of them...I can't even do it, the tears come hard and fast, washing away any such thoughts.