C95 History of yin and yang

Take this Yin Yang Sphere for example, actually my heart doesn't have much of an epiphany, because I can understand it and enter my own mind in an instant, so I don't know what's wrong with me, I only know that during a certain period of time, my brain will feel as if it's cramping up, so it's because of this, the entire contents of this secret manual suddenly entered my brain, causing me to have