Mind a Mystery.....

Just yesterday on my routine journey to office an interesting thought struck my mind..yes the very mind which in itself was the point of focus..I was wondering how difficult it is to think exactly what you want.....Mind the most capricious creations of all would wander exactly in the opposite direction when u want to think about something...Then a strange thought occured..what if u had the ability to think only what you wanted..would it be be good /bad????Would you categorize the ability of such a person as narrowmindedness(Narrow used here in the literal sense...) or would you call him focussed???Would it be a limitation of mind