The meaning is not quite clear, yet I'd say that "path" collocates better with "dreams" than "road". In case you imply that you can achieve your dreams applying your brain, (mental) faculties, probably, will sound better; if you mean that your success depends on your mindset, it's better to say so. Hope it'll help))

I would say " your mindset is the key to your dream" Not sure how natural this sounds too though!

Your imagination can be the path to your dreams.