single soul

Friendship is a single soul living in two bodies.

two people

Two people can't wish to be friends long if they can't manage to forgive each other's minor failings.

Life is without

Life is nothing without your friendship.

improves

Friendship improves happiness and abates misery, by the doubling of our joy and the dividing of our grief.

distance

There is no distance too far between best friends, for friendship gives wings to the heart.