May God in his mercy enable us without obstinacy to perceive our errors.
Michael Servetus

Obstinacy in a bad cause is but constancy in a good.
Thomas Browne

Obstinacy is the result of the will forcing itself into the place of the intellect.
Arthur Schopenhauer

One of the satisfactions of a genius is his will-power and obstinacy.
Man Ray

Public opinion is a compound of folly, weakness, prejudice, wrong feeling, right feeling, obstinacy, and newspaper paragraphs.
Robert Peel

The difference between perseverance and obstinacy is that one comes from a strong will, and the other from a strong won't.
Henry Ward Beecher

The obstinacy of cleverness and reason is nothing to the obstinacy of folly and inanity.
Harriet Beecher Stowe

'Tis known by the name of perseverance in a good cause, and of obstinacy in a bad one.
Laurence Stern