What is Friendship?

"A friend is someone who knows the song in your heart and sings it back to you when you have forgotten how it goes.""A friend will know you better in the first minute they see you, than your acquaintance will in a thousand years.""A friend is one who believes in you when you have ceased to believe in yourself.""A best friend is like a four leaf clover - Hard to find, and lucky to have.""A friend