Knowing who you are as a person can shield you from a world of hurt. When you don’t know what behavior(s) you accept from others, you leave yourself wide open to be taken advantage of.
For example, when dating, you set the standard from the beginning as to how you want to be treated. If at any point you don’t like something that’s said and/or done, it’s your responsibility to speak up. Otherwise, the other party will assume that sort of behavior is acceptable and it will continue to happen.
You show people how you want to be treated. Know your worth.