ELI5: Explain Like I'm 5

Pre-existence

Pre-existence means that before you were born, you were living somewhere else. People who believe in pre-existence believe that before you came to Earth, you lived in Heaven with God, and you chose to come here so you could learn and grow. Just like a caterpillar lives in a cocoon until it turns into a butterfly, some people believe that when we die, we go back to Heaven and turn into a better version of ourselves.