Obstinacy is will asserting itself without being able to justify itself. It is persistence without a reasonable motive. It is the tenacity of self-love substituted for that of reason and conscience. – Henri Frederic Amiel

Like all weak men he laid an exaggerated stress on not changing ones mind. – W. Somerset Maugham

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

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