the.com/knife edge
The exact point where confidence and disaster share a zip code.
means A state of extreme precariousness where a situation could tip toward success or ruin with the slightest push.
from Straightforward compound of 'knife' and 'edge' — literally the thin, sharp line of a blade, where there's no room to stand. By the 19th century it was being used figuratively for any perilously narrow margin — a knife-edge victory, a knife-edge decision — borrowing the blade's essential quality: the instant, irreversible line between one side and the other.
- origin
- literally a blade thin enough to cut either way
- physics use
- describes unstable equilibrium, one nudge tips everything
- sports cliché
- games are never close, they are always on one
- irony
- the thinnest line carries the heaviest consequences