The man must have a rare recipe for melancholy, who can be dull in Fleet Street. Charles Lamb
The first requirement of a statesman is that he be dull. Dean Acheson
Authors have established it as a kind of rule, that a man ought to be dull sometimes as the most severe reader makes allowances for many rests and nodding-places in a voluminous writer. Joseph Addison
Among the rich you will never find a really generous man even by accident. They may give their money away, but they will never give themselves away; they are egotistic, secretive, dry as old bones. To be smart enough to get all that money you must be dull enough to want it. G. K. Chesterton
Honestly, for an evil god of darkness, he certainly can be dull. Brandon Sanderson
It won't be dull in hell 'cause there are many companions. Finnish Proverb