Contention is a hydra's head. [ Robert Burton ]

A narrow mind begets obstinacy. [ Dryden ]

Fools are stubborn in their way,
As coins are hardened by the allay;
And obstinacy's never so stiff
As when 'tis in a wrong belief. [ Butler ]

Stiff in opinion, always in the wrong. [ Dryden ]

Obstinacy is the strength of the weak. [ Lavater ]

An obstinate man does not hold opinions, but they hold him. [ Pope ]

Obstinacy is ever most positive when it is most in the wrong. [ Madame Necker ]

There are few, very few, that will own themselves in a mistake. [ Swift ]

Obstinacy and vehemency in opinion are the surest proofs of stupidity. [ Barton ]

The obstinacy of the indolent and weak is less conquerable than that of the fiery and bold. [ Lavater ]

Firmness or stiffness of the mind is not from adherence to truth, but submission to prejudice. [ Locke ]

Obstinacy in opinions holds the dogmatist in the chains of error, without hope of emancipation. [ Glanvill ]

Narrowness of mind is often the cause of obstinacy; we do not easily believe beyond what we see. [ Rochefoucauld ]

Obstinacy and contention are common qualities, most appearing in, and best becoming, a mean and illiterate soul. [ Montaigne ]

People first abandon reason, and then become obstinate; and the deeper they are in error the more angry they are. [ Blair ]

The despotism of will in ideas is styled plan, project, character, obstinacy: its despotism in desires is called passion. [ Rivarol ]

Obstinacy and heat in argument are surest proofs of folly. Is there anything so stubborn, obstinate, disdainful, contemplative, grave, or serious, as an ass? [ Montaigne ]

Obstinacy is the strength of the weak. Firmness founded upon principle, upon the truth and right, order and law, duty and generosity, is the obstinacy of sages. [ Lavater ]