One major theme from Thirteen by Tao is that nobody is perfect. Everyone has flaws and imperfections that shape who we are. Making mistakes is part of being a human. “Accept disgrace willingly. Accept misfortune as the human condition” I believe that Tao wants us to accept ourselves for who we are and look past our imperfections. There will be times where we make mistakes, commit wrongdoings, get embarrassed, etc. Tao wants us to accept these moments and take them as lessons instead of using them as a means to hold ourselves back. That is how one becomes the best version of themselves.
“Accept being unimportant. Do not be concerned with loss or gain.” There are more important things than being well known and winning and losing. Tao wants us to stop being concerned about what others think of us. “Misfortune comes from having a body. Without a body, how could there be misfortune?” Tao is reiterating that bad luck, misfortune and making mistakes come with being a human being and there is no way to avoid it. So stop worrying about trying to be perfect and just love yourself for who you are.