Idleness is the key of beggary.

The saying presents habitual inactivity as a route to poverty or dependence. “Key” is figurative: it suggests that neglecting useful effort can open the way to material want.

It is a moral warning, not a literal economic rule or a judgment on any individual. Used broadly, it can overlook illness, unemployment, discrimination, caregiving, and other personal or structural constraints.

Use it to urge diligence or caution against avoidable inactivity and neglected work. Avoid applying it to people experiencing poverty, since it can sound harsh and imply that hardship is solely their own fault.