Who is your favorite author?
Alan Watts is my favorite author 
What is the best thing he taught you?
How to be Free. 
What does it mean to be truly free?
Acceptance. When you are out of questons to ask, you are free. 
Then it seems that you have accepted to close your mind if you are no longer asking.
There are no open or closed minds...there is just a mind.
It depends what you are doing with it, if you have any control at all. 
For anything to depend on anything a goal must be set. If there is no goal there is nothing depending on anything thus there is no need for controlling anything