“Bad neighborhoods”. This is a metaphor to help people see more quickly the way they get into an area that has kind of a suction to it, but if you can stay away from that, then you may not end up in trouble. It’s a little easier to avoid a physical bad neighborhood in that you can avoid it. When the bad neighborhood is a physiological habit like addiction that compromises intelligence, it may be a more difficult situation. Sokuzan talks about working in the realm of these neighborhoods.

https://www.youtube.com/watch?v=Vo0TL3lbuwg&t=2s