Obstinate people can be divded into the opinionated, the ignorant, and the boorish.
— Aristotle

Fools and obstinate men make lawyers rich.
Proverbs obstinate quote

Metaphysics means nothing but an unusually obstinate effort to think clearly.
— William James

My great mistake, the fault for which I can't forgive myself, is that one day I ceased my obstinate pursuit of my own individuality.
— Oscar Wilde

Life is obstinate and clings closest where it is most hated.
— obstinate quotation by Mary Wollstonecraft Shelley