the power of dreams

I've always been fascinated with dreams even as a child. As i grew older i found that dreams had alot more power in our waking lives then i first thought.

Everyone as a dream but only the few act on them. Albert Einstein, Mozart, Cesar to name a few.

martin luther king is famous  for his "I HAVE A DREAM" speech. He envisioned a world where men were all equal. well look at his dream now men on the whole are equal.
His dream was that powerful that it started changing our world to what it is today.
So lets look at the darker side of someones dreams and the effect they can have.
how about hittlers dream of a master race.look at the effect that had on our world. it was devastating wasn't it. 
He dreamed of killing all the sub races that wasn't german. but i thank our lucky stars his dream failed.
so there you go dreams have a power and we don't really know much about and what causes they can have on our world
No matter what you or i dream maybe its good that not all of us act on them.
would you really want another hittler living his dream or another albert einstein and his theroy on relativity? 
i know which i'd prefer and i'm guess you'd agree with me.