People sleep peaceably in ...

People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf.
People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf.
 Richard Grenier

More phrases

If one does not know to which port one is sailing, no wind is favorable.
What a distressing contrast there is between the radiant intelligence of the child and the feeble mentality of the average adult.
We are masters of the unsaid words, but slaves of those we let slip out.
I have always found that mercy bears richer fruits than strict justice.
A lie gets halfway around the world before the truth has a chance to get its pants on.