Siblings can be the most enduring relationships you have in your life. They know you before significant others come along. They know life with your parents and life after your parents die. They know you before major successes and failures. It is for these reasons that the relationship between siblings is emotional and complex. I grew up with an older brother, a younger sister, and a younger brother and know all too well that while siblings know how to raise each other up, we also know how to cut each other deeply where it hurts.