A good cut should function like a blink, not a mechanical splice

Murch's foundational claim is that human blinking isn't random eye maintenance but occurs at moments corresponding to shifts in internal thought or attention, and that great film cuts operate on the same psychological principle, occurring exactly when a viewer's attention is ready to shift to something new. He observed that people tend to blink when a thought concludes or a new one begins, and hypothesized that if an editor cuts at the moment a viewer would naturally blink watching the real scene, the cut feels invisible and emotionally correct rather than jarring. This reframes editing from a technical exercise in trimming footage to a psychological art of anticipating exactly when an audience's internal attention is ready to move on. Murch even tested this by observing test audiences' actual blink patterns during rough cuts, finding correlation between blink clusters and moments where cuts felt natural. The theory gives editors an internal, intuitive compass beyond rigid continuity rules.

Takeaway: The best cut happens exactly where the audience was already about to blink.