Dan

“The prescience, he realized, was an illumination that incorporated the limits of what it revealed- at once a source of accuracy and meaningful error. A kind of Heisenberg indeterminacy intervened: the expenditure of energy that revealed what he saw, changed what he saw.

And what he saw was a time nexus within this cave, a boiling of possibilities focused here, wherein the most minute action - the wink of an eye, a careless word, a misplaced grain of sand - moved a gigantic lever across the known universe. He saw violence with the outcome subject to so many variables that his slightest movement created vast shiftings in the patterns.

The vision made him want to freeze into immobility, but this, too was action with its consequences.”
― Frank Herbert, Dune