I've posted before about the wonder I have at my girls sometimes, what it must be like to be a twin. Every now and again I capture a small inkling of what it must be like for them.
The idea that someone will always be at your side who is so much like you. The idea that your sister is there to tell you that you will be fine, she's there to help. I hope my girls are always at least as close as they are right now.