Caring for but never trying to own may be a further way to define friendship.

It is not so much our friends' help that helps us, as the confidence of their help.

Friends... they cherish one another's dreams. They are kind to one another's dreams

As iron sharpens iron, so a friend sharpens a friend.

Friendship, like the immortality of the soul, is too good to be believed.

A man cannot be said to succeed in this life who does not satisfy one friend.

In friendship as well as love, ignorance very often contributes more to our happiness than knowledge.

You can always tell a real friend: when you've made a fool of yourself he doesn't feel you've done a permanent job.

Let there be no purpose in friendship save the deepening of the spirit.

Never have a companion that casts you in the shade.