Friends are like soldiers. They will stand together and have the same or similiar beliefs. They will fight for each other and possibly risk their lives for another. They will not allow the other to fall. That is what friends are for.
Life is a part of who you are. Your life determines what you do and what you don't do. You learn social roles and rules and what to do and not to do. That's what life is about. It's about learning and verstehen.