556
The Brain, within its Groove
Runs evenly—and true—
But let a Splinter swerve—
'Twere easier for You—
To put a Current back—
When Floods have slit the Hills—
And scooped a Turnpike for Themselves—
And trodden out the Mills—
Emily Dickinson
http://www.poemhunter.com/poem/the-brain-within-its-groove/