We all know the feeling. A sense of clarity characterized by creativty and openness. It's basically a good mood with depth. The train of thought is charging. It's the mood when television is a horrible idea. When most great ideas are midwifed. When bees are funny.
I'm willing to (basically) admit this state of mind is chemical, so the question is this: These chemicals, do they run out? If one were to find away to experience this heightened consciousness constantly, would they eventually suffer a depression (like manic depressive people) or able to sustain it (like possibly buddhist monks). Is it a muscle that can be exercised and strengthened, or is it a well that gets tapped?
It's too bad there isnt an expert on pleasureful brain chemicals on this blog or this question could possibly be answered. oh wait...