Dream is not a revelation. If a dream affords the dreamer some light on himself, it is not the person with closed eyes who makes the discovery but the person with open eyes lucid enough to fit thoughts together. Dream- a scintillating mirage surrounded by shadows- is essentially poetry.
Dreaming/dreaming big is advisable and encouraging too. But mind you, in order to make your dream a reality. You must/have to pull your weight i.e. endeavour to do what you ought to do and when you ought to do it. Because doing just that, will speedily metamorphose your dreams into realities.
Everything you will ever need to go after/accomplish/fulfill your goal/dream/vision or any other target/aspiration which you will ever set/aspire for is already sitting/waiting patiently inside you. Oh! Yes, all you've got to do is just to take a leap/step of faith forward/towards your goal/target/dream/vision/aspiration and then, sit back and watch it materialize/come true gradually/sooner or later.