I swear I've had every conceivable thought. But perhaps not, I've never thought of what is inconceivable, what is unimaginable, what's constricted from the unlimited space of my imagination.
I can't perceive what I cannot grasp; this scares me. What can't I think of? I honestly can't recall or think of it.
What haven't I thought of? Surely I thought of it at least once, I think, once while I was pondering on thoughts, and jotting every instance upon my mind.
Idly yet intensely thinking for a thought. Now if I think hard enough, I can remember the thought and moment of impossibility and perhaps quixotically. I wrote it down.
I did I swear; it goes, I swear I've had every conceivable thought. But perhaps not.