As I become more mentaly active I find that I start to feel happier and more vital and life starts to have more of a sense of dirrection.

The problem is where does thinking become a problem and cause someone to become mentaly unbalenced?  Yes it easilly could go in this dirrection.   I think it depends on what track or tracks your brain is on.  A person can seriously think about things that are kind of out there.   I believe this is worse than subjecting oneself to escapes which are out there like telivision which at least may have some artistry.   So as a thinker and someone who likes some good entertainment the issue is artistry.   To be continued in another post.