I agree that our race hasn't nearly evolved far enough to be able to handle the tension that would come with it. The furthest we can come is an occasional glips of the future (or a possibility and mainly vague) This results in Déjà-Vûs, because you will not remember most of them or want to for that matter (exeptions are available). and some other minor stuff.

So what, you will most likely burn out and die young... It's the closest you could get to eternal youth. It's better then eternal life!

Eternal = forever
forever in a human life is until death.
if you live forever you'll keep growing older and older and older... I don't call that living!

We indeed use most of our brains, that means there's brain-activity everywhere, but the main reason for that is that it's alive, except for those millions of braincells we drown in gallons of alcohol. *hic* So we only use about 4% efficiently.

I drink to that!