Light at the end of the tunnel

Sometimes i`m wondering .. what is the necessity of a light at the end of a tunnel? Why do we have to even get out of the tunnel? When a feeling of such rush and adrenaline can keep you constantly there where you feel most comfortable with yourself, why would you want to end the process that`s keeping you "alive"?

People sometimes ask why artists feel a deep urge to share their work with the world, with their public? I would guess it must come from a need to simply share life with another, with a special someone that could understand and when there isn`t any "sombody", you kind of need to display what is to everybody.

So, by the way,  i`m having a terrible migraine. I`ve had it all day...