When my little sister was about 4, she stepped barefoot on a broken piece of glass nicked a major artery and nearly bled out. After an extended stay in the hospital, she told us she wasn't scared in the hospital. She told us, "because a little girl held my hand and told me she was protecting me. She said we were sisters". She didn't know this at the time, but one of our sisters had died just after birth many years before.