Each day is recorded and audited against a fixed set of standards, converting vague intentions to cultivate virtue into a concrete ledger of specific lapses (idleness, improper speech, lustful thoughts). The writing itself is the discipline: the act of naming a failure in ink makes it accountable rather than forgotten.
Zeng repeatedly identifies two faults, indolence (duo) and self-importance (ao), as the source from which most other failings grow. He treats character reform not as pursuing many virtues at once but as attacking these two defects at their root.
The quality of jing (reverent seriousness) is to be maintained in trivial matters: sitting upright, handling correspondence, ordinary conversation, not only in grand decisions. Inner composure is held to manifest in visible bodily bearing, so controlling posture and demeanor is itself a method of controlling the mind.
External frustrations and interpersonal friction are interpreted first as mirrors of personal deficiency rather than others' wrongs, so each unpleasant incident becomes evidence to examine in oneself. This reframing turns ordinary daily life into continuous material for correction.