“A narrow mind and a fat head invariably come on the same person.”

The Moaning of Life, General Quotes

Lord Northcliffe; quoted in The Oxford Companion to Children's Literature ISBN 0-19-211582-0, art. "Arthur Mee" p. 347.
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Rio on Racism Sourced

Source: The Black Room (1975), p. 57
Context: When I'm bored, my sense of values goes to sleep. But it's not dead, only asleep. A crisis can wake it up and make the world seem infinitely important and interesting. But what I need to learn is the trick of shaking them awake myself... And incidentally, another name for the sense of values is intelligence. A stupid person is a person whose values are narrow.

Source: The Book on the Taboo Against Knowing Who You Are (1966), p. 26-27

"On the Tendency of Sects"
The Round Table (1815-1817)
Context: There is a natural tendency in sects to narrow the mind.
The extreme stress laid upon difierences of minor importance, to the neglect of more general truths and broader views of things, gives an inverted bias to the understanding; and this bias is continually increased by the eagerness of controversy, and captious hostility to the prevailing system. A party-feeling of this kind once formed will insensibly communicate itself to other topics; and will be too apt to lead its votaries to a contempt for the opinions of others, a jealousy of every difference of sentiment, and a disposition to arrogate all sound principle as well as understanding to themselves, and those who think with them. We can readily conceive how such persons, from fixing too high a value on the practical pledge which they have given of the independence and sincerity of their opinions, come at last to entertain a suspicion of every one else as acting under the shackles of prejudice or the mask of hypocrisy. All those who have not given in their unqualified protest against received doctrines and established authority, are supposed to labour under an acknowledged incapacity to form a rational determination on any subject whatever. Any argument, not having the presumption of singularity in its favour, is immediately set aside as nugatory. There is, however, no prejudice so strong as that which arises from a fancied exemption from all prejudice. For this last implies not only the practical conviction that it is right, but the theoretical assumption that it cannot be wrong. From considering all objections as in this manner "null and void,” the mind becomes so thoroughly satisfied with its own conclusions, as to render any farther examination of them superfluous, and confounds its exclusive pretensions to reason with the absolute possession of it.

J. Agee, trans. (1989), p. 48
Das Geheimherz der Uhr [The Secret Heart of the Clock] (1987)