He hath not eat paper, as it were; he hath not drunk ink; his intellect is not replenished; he is only an animal, only sensible in the duller parts. (Shakespeare, Love's Labor's Lost, IV)
There are some lives duller Than dusty glass
In all private quarrels the duller nature is triumphant by reason of dullness.
It was a Sunday afternoon, wet and cheerless; and a duller spectacle this earth of ours has not to show than a rainy Sunday in London.
Truth is always duller than fiction.
The better organized the state, the duller its humanity.
As with most liberal sexual ideas, what makes the world a better place for men invariably makes it a duller and more dangerous place for women.
The world would be a duller place without Moulin Rouge.
. . . when caught unawares I usually tell the truth, and what's duller than that?
The most beautiful things in the creating of the child are his "mistakes. " The more a child's work is full of these individual mistakes the more wonderful it is. And the more a teacher removes them from the child's work the duller, more desolate and impersonal it becomes.