I'd read somewhere that the workings of our brains are just too complex for us to understand, or rather, we are just too good to understand it thoroughly to "unlock the powers".

You see, if the brain was simple enough for us to understand its workings, we would not be even capable of understanding the basics of the nervous system functioning (we would have been just too dumb with such simple brains!), and therein lies this irony - We will never be able to fully understand our own brains, because that very impossibility has given us the ability to understand almost everything else in this universe.