Its not bad to dream high and to keep on moving just to reached it.
It is like climbing a mountain that we need to pass a different obstacles. Even we fall down many times or sometimes feel tired but we need to keep on moving forward just to be in the top of it. We need to encouraged ourselves always that we dont need to quit but to fight and win.
It is a nice feeling to be in the top of a mountain and i believe it will be the same feeling as you reach your dream in life. .