Sisters come in a variety of shapes and sizes; some are overprotective, while others are rigid, possessive, forthright, cool, and so on. Whatever sort of sister you have, consider yourself lucky to have her in your life. Your sister is your best friend, with whom you share all of your secrets and who always listens to and guides you. There are few people who will love and support you like your sister does, so don't ever forget that. The dictionary defines the word "sister" as a female sibling, but that's not how we usually think of sisters. We usually associate sisters with friendship, loyalty, and support. No one can ever replace their sister, but there are other relatives who can fill in the gap if necessary. Sister-in-law, brother-in-law, niece, and nephew all belong to this category of relative who shares part of your family history. They aren't replacements for your sister, but they are good friends who you can rely on during difficult times. As long as she is alive, your sister will be there for you, no matter what. She may not be able to travel across the world to find new things about which to tell you, nor will she be there when you need someone to talk to, but she will always be there for you whenever you need her. That is why it is said that sisters are the closest friends you can have in life.