our brains aren't complex enough to understand how our brains work.
So it's probably safe to say our brains couldn't comprehend some force that created us, or any life forms more evolved than us.
If there are aliens, if there's a God, we sure as heck wouldn't be able to understand them anyway, with our pea brains.
you are probably correct- whats more, we probably wont EVER be able to comprehend how our brain works, which is why we design and build hardware to do it for us..by piecing together bits we do understand, or have learnt, and then getting a machine to tie it all up. that being said, we're still 100s, if not 1000s of years from piecing it all together and making a machine that can be used as a model.
apparently we have created a complete structure of how a mouse's brain works so far...and apparently its 1 kazillion trillion billion times less complex than our own.