Those internal doors
The number of choices that can be made in a system determines how complex it is.
We all find within us new doors, new avenues, and new directions to take.
Some people want to limit the complexity that is their lives. Whenever they encounter a new door they will keep it closed, by default.
Others flagrantly kick open every door they find with no regard for the consequences.
It is the people that learn how to gently open, and then firmly close the doors that don't suit them, that find their way.