Some branch of Christians said that often, which I learned in high
school English class. Regardless who said it, it is a very apt description --
some (many?) humans like me have a very prominent thinking capacity and if we
are in a depressed mood this idle "monkey mind" (Buddhists I think) becomes
an annoying hamster wheel of negative thoughts. Combined with Bipolar Disorder
and other "illnesses" it compounds into a pretty bad phenomenon in adulthood.
Over time this DMN (or DeMoN(e)) works against us and we need to retrain it.
We can redirect the energy in this part of the brain to the physical senses;
this is what all contemporary psychologists tell us. Most instruct us to focus
on the present; one person actually developed four other methods to retrain/
reframe this network. I will edit this with her name when I find it.