A sister can be seen as someone who is both ourselves and very much not ourselves - a special kind of double.
~ Toni Morrison

Children of the same family, the same blood, with the same first associations and habits, have some means of enjoyment in their power, which no subsequent connections can supply...
~ Jane Austen, Mansfield Park, 1814

What's the good of news if you haven't a sister to share it?
~ Jenny DeVries

Sisters is probably the most competitive relationship within the family, but once the sisters are grown, it becomes the strongest relationship.
~ Margaret Mead

Bless you, my darling, and remember you are always in the heart - oh tucked so close there is no chance of escape - of your sister.
~ Katherine Mansfield

A sister smiles when one tells one's stories - for she knows where the decoration has been added.
~ Chris Montaigne

More than Santa Claus, your sister knows when you've been bad and good.
~ Linda Sunshine

If sisters were free to express how they really feel, parents would hear this: "Give me all the attention and all the toys and send Rebecca to live with Grandma."
~ Linda Sunshine

My sister taught me everything I really need to know, and she was only in sixth grade at the time.
~ Linda Sunshine