A sibling may be the keeper of one's identity, the only person with the keys to one's unfettered, more fundamental self.
Siblings are the people who teach us about fairness and cooperation and kindness and caring, quite often the hard way.
Siblings are the people we practice on, the people who teach us about fairness and cooperation and kindness and caring, quite often the hard way.
Siblings: children of the same parents, each of whom is perfectly normal until they get together.
Having a sister is like having a best friend you can't get rid of. You know whatever you do, they'll still be there.
Siblings are like streetlights along the road, they don't make the distance any shorter but they light up the path and make the walk worthwhile.