Siblings: the people we practice on, the people who teach us about fairness and cooperation and kindness and caring, quite often the hard way.

Our brothers and sisters are there with us from the dawn of our personal stories to the inevitable dusk.

Siblings: children of the same parents, each of whom is perfectly normal until they get together.
Siblings: the definition that comprises love, strife, competition and forever friends.
There's no other love like the love for a brother. There's no other love like the love from a brother.
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.
A sibling may be the keeper of one's identity, the only person with the keys to one's unfettered, more fundamental self.
A sibling is also one of your best friends, one of your first friends, and one of your longest-lasting friends.