Time
Believe it or not, this little beauty is a measure of time for me. I count the months of her wonderful existence along the path of my own life, all the blessed memories, laughs and growing stages. She's five and a half months old now, and so I recount how I'd grown during those same months. The same hope I have for her future as she grows and learns to laugh and learns new skills and becomes more of herself, I have for myself. Growth is the most beautiful thing I observe in my little nieces and nephews.
(This was norah at 2 days old. Oh how much she's grown since then!)