When does a person's personality begin? It must be at the moment of physical birth. At that time, the soul has not yet formed, but the body is already capable of perceiving and accepting this world. Therefore, whether the family is harmonious, negative energy or positive energy—you're already able to receive it. However, you don't have a memory chip; you see but cannot store these experiences. The body helps you store these feelings. Until one day, you no longer watch the same cartoon episode, and then you form the foundational color of your personality.