the.com/moment of clarity

means A short stretch of time in which you suddenly see a situation exactly as it is, without the usual fog of denial, distraction, or self-deception.

from Not an ancient idiom but a plain-English pairing — 'moment' (from Latin 'momentum,' a movement or a tiny unit of time, itself tied to 'movere,' to move) and 'clarity' (from Latin 'clarus,' clear or bright). Together they're a modern phrase, popularized especially through recovery and self-help language in the 20th century, where it described the sudden, sobering instant someone sees their situation plainly. The words are old; the phrase's common use is recent.