Power of Imagination

My son recently argued with me that he never really wants to grow up. Bit worried, I asked him why - after all my retirement plan was based on his ability to grow and get out of my house! His argument was very simple, he told me that he is afraid that he might loose his power of imagination if he grows up.  For some reason he seemed to think that adults don't really have imagination powers (being young child he hasn't met lot of investment bankers yet!).  He went on explaining how he can imagine super hero toys talking to him or his friends donning various costumes and 'imagining' that they are some kind of heroes and so on. He has not seen any adults doing that, so he never wanted to be an adult.  Deceptively simple logic - of course one could excuse any rational adult human for not wearing tight clothing and not being a super hero with underpants on outside. Nevertheless he had a valid point.  

Is it true that as adults we tend to be more rational than necessary? At a times it almost seems like. Our ability to imagine is limited to fantasizing about some not-so-childish-activities with the popular movie/super hero (or heroine as the case may be).  Is it true that we adults can not see the different picture than is presented to us? Perhaps it is better that we do not "imagine" things. I am not sure where I would land if I let my imagination wander. As adults the thoughts and ideas are more profound and are not limited to being a person that can fly while showing underwear.  I think it is part of the growing up that we limit ourselves to contextual imagination - not wandering around. Creative people and scientists could argue in favour of thinking new ideas, but large majority - I am sure could do without it.  After all how much imagination you would want to have to pull you through your daily life? Too much of it and you are ready for white clothes, bed and male nurses in mental hospital, too little of it and your mind is fatigued at the end of the day. The key is having enough power of imagination to survive the life and perhaps make some money out of it - be it fantasizing about movie star or an idea that gives you better job! But not really loose it.

I told my son that one never really looses the power of imagination, as one becomes adult, one simply learns how to make money from it. I am sure he will learn that in due course, after all it is one thing to imagine about being a super hero and another to sell super hero toy collectibles on eBay.