Nice post @velimir.
For an unknown reason, i cant view the picture. I have tried refreshing my browser so many times but to no avail. But from your excellent description, one can even grasp more than intended because you have a way of letting our imaginations do the job :), and i think it did the job this time.

But this one doesn't light anything, right? We have exactly the opposite - the shadow of the lamp lights nothing. The shadow of the lamp works well with the mysterious shadow with a strange hand gesture

From your description, i really would return to make sure i view the pic. I would like to see how the above statement turned out, because right now, its all my imagination which i already like :)
When i was little, i was afraid of the dark. Most of us were. And I doubt we ever thought to question this fear. We were almost naturally taught to be afraid of the dark, because the dark is full of unknown things that might hurt us and that mysterious side you are talking about. But what usually happened when you turned the light on? You learned the unknown things were not so scary. And they were not so unknown. They were just part of the environment. I believe that because there was no light from the lamp, that was what revealed the dark side of the lamp.
Our mysterious side can show itself as weakness or strength. Becoming aware of our complete self, however, grants us the opportunity to express strength.
As a result of past experiences, we have decided to negate and hide this mysterious and dark side without exploring it further. And so in return it keeps us from truly expressing ourselves.
In many ways, hiding our shadow can be considered the highest form of betrayal. By concealing this part of us, we are saying we don’t deserve to show our complete selves, thereby betraying ourselves. In return, secrecy, manipulation, and pretending take over large parts of our lives, out of fear of being ‘exposed’ and rejected for the part of ourselves we are hiding.
Thank you for sharing @ velimir. I am sure the readers liked it.