To be in your own thoughts — language, like headphones, delivers a sense of privacy.
Of course, no thinking is linear. Neurons are always crashing into each other, trying to connect and build new avenues of ideas.
The whole of brain waves is greater than the sum of its parts. Neurons that fire together, wire together.
But knowledge presents a key constraint in the gobbling of information — it requires a dishwasher of synthesis to make even more sense of the apparent world.
Amid the maw of boredom and the vegetation of rest, the brain activates in full by connecting all the dots.
Whatever your neurons are up to this very moment determines what you do next.