Soul relocating to my younger self

I'm just wondering what it would be like if my soul travelled back in time and inhabited my 13 year old body? I'm guessing I'd lose my current intelligence, but yet retain my current memories as an adult. But if I do keep my memories, it seems I might understand more on, say, something like philosophical issues, than I originally did when I was 13. But I wouldn't understand as much as I do now.