Pit
Our mind is indeed fascinating. It lets us think about some things that wouldn’t happen in real life, but over thinking could also be dangerous.
Over thinking is like black paint over writing a red paint. Everything becomes black eventually.
Black is dangerous.
Once the mind is at its peak, one could change, literally.
What are the causes of one having a black mind?
People.
What would a black mind think about dealing with the people who are the roots of its problems?
The mind will then bottle up the negativities and become darker.
Darkness is a pit.
Until it really becomes a pit, it would be the end of everything and nothing is going to change anything.