Maybe 3 things or more. Trauma, spirits, chemical imbalance. I was kind of thinking trauma & chemicals because if you look at some people who hit their head, went into a coma then come out speaking 7 languages, math skills off the charts or painters. I mean like the idiot savants. It's the brain. Imagine if we could actually figure out how to rewire the brain so we could be on THAT level. wow. I don't want to believe in spirits. It's too freakin scary to me. Some weirdo enters into your body!? ouch.... nooooooo.
How do you seriously imagine that a trauma plus some random 'unbalanced' assortment of chemicals is going to lead to "speaking 7 languages, math skills off the charts or painters"? This stuff inset in the brain - so rewiring it is pointless
Spirits have nothing to do with entering your body [well, mostly not] - at least in this context. Chill.