an idle brain is the devil's workshop

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an idle brain is the devil's workshop

proverb 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 an idle brain is the devil's workshop.
See also: brain, idle, workshop
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

idle brain is the devil's workshop

Prov. People who have nothing worthwhile to think about will usually think of something bad to do. We need to figure out something constructive for Tom to do in the afternoons after school. An idle brain is the devil's workshop.
See also: brain, idle, workshop
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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