Or rather, he was sad because that morning he'd understood that he'd understood nothing, because while he still understood nothing he wasn't sad at all, but now that he'd understood that he'd understood nothing he felt sad, if you follow.

Twist a tongue, and tongue a twist how many twists can a tongue twister twist around the twisting tongue.

Twist a tongue, and tongue a twist how many twists can a tongue twister twist around their twisting tongue. If a tongue twister's tongue could twist, how many twists would the tongue twister's tongue twist while their tongue was a twisting.