Sloth is one of the seven deadly sins in Catholic teachings. It is the most difficult sin to define and credit as sin, since it refers to an assortment of ideas, dating from antiquity and including mental, spiritual, pathological, and conditional states.[1] One definition is a habitual disinclination to exertion, or laziness.[2][better source needed] Views concerning the virtue of work to support society and further God's plan suggest that through inactivity, one invites sin: "For Satan finds some mischief still for idle hands to do." ("Against Idleness and Mischief" by Isaac Watts).