I don't mean to imply by my previous post that it's inevitable that a person will get dumber as they get older. I simply don't believe that at all. But I do think that, when a person does, it's because of specific triggers. In my case, severe emotional trauma. But I also believe that it's possible to restore some, many, or all of those previous abilities.

It's also not, with me anyway, a case of passion wearing off. I'm still just as interested in archaeology, history, literature, astronomy, physics, whatever as I was before - it's just that I have blocks in place that prevent me from learning as easily and as well as I used to.

Don't lose hope just because some of us have lost those abilities. Focus on retaining yours. Have fun with your gifts and explore your interests as widely as you possibly can.