idleness is the root of all evil
When one has nothing to do, one is more likely to get into trouble. When I'm off from school, my grandmother is always trying to get me out of the house, while reminding me that idleness is the root of all evil.
Idleness is the root of all evil.
Prov. If you have no useful work to do, you will think of harmful things to do in order to amuse yourself. (Compare this with Money is the root of all evil.) Child: Why do you make me do so many chores? Father: Idleness is the root of all evil.