I felt a Cleaving in my Mind—
As if my Brain had split—
I tried to match it—Seam by Seam—
But could not make it fit.

The thought behind, I strove to join
Unto the thought before—
But Sequence ravelled out of Sound
Like Balls—upon a Floor.

I’m reading Driven To Distraction, by Edward M. Hallowell. Dr. Hallowell presents this poem, by Emily Dickinson, as an unintentional, but perfect description of the ADD mind.

I can’t say I’m any sort of poetry expert, but this is beautiful and I absolutely relate to the ADD comparison.