The enemy was too strong for me, but he was severely punished for his obstinacy. His casualties were more than quadruple mine.

That which is called firmness in a king is called obstinacy in a donkey

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

Obstinacy is ever most positive when it is most in the wrong.

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

Obstinacy in a bad cause is but constancy in a good