I Felt a Cleavage in My Brain

I felt a cleavage in my mind 
  As if my brain had split; 
I tried to match it, seam by seam, 
  But could not make them fit. 
   
The thought behind I strove to join         
  Unto the thought before, 
But sequence raveled out of reach 
  Like balls upon a floor.

I love Emily Dickinson. That's it. I just wanted to say it again.