old ruts of thought
...Thoreau's Journal: 24-Sep-1859
Though you may have sauntered near to heaven’s gate, when at length you return toward the village you give up the enterprise a little, and you begin to fall into the old ruts of thought, like a roadster. Your thoughts very properly fail to report themselves to headquarters. Your thoughts turn toward night and the evening mail and become begrimed with dust, as if you were just going to put up at (with?) the tavern, or even come to make an exchange with a brother clergyman here on the morrow.